 Bishop Giuseppe Marazzi Born:1875.12.20 (Italy)Ordained Priest:1899.04.01Consecrated Bishop:1928.07.25Died:1933.10.23 († 57)Titular Bishop of Oropus (1928.06.08 – 1933.10.23)Auxiliary Bishop of Albano (Italy) (1928.06.08 – 1933.10.23) |
 Bishop Charles Marbach Born:1841.11.21Ordained Priest:1864.12.17Consecrated Bishop:1891.07.21Died:1916.10.15 († 74)Auxiliary Bishop of Strasbourg (France) (1891.06.04 – 1901.09)Titular Bishop of Paphos (1891.06.04 – 1916.10.15) |
| Bishop Auguste Marchal Born:1823.04.16 (France)Ordained Priest:1848.09.22Consecrated Bishop:1888.07.29Died:1900.01.16 († 76)Auxiliary Bishop of Bourges (France) (1888.06.01 – 1892.05.26)Titular Bishop of Sinope (1888.06.01 – 1900.01.16) |
 Bishop João Batista Marchesi, S.D.B. Born:1889.06.24 (Italy)Ordained Priest:1916.04.09Consecrated Bishop:1962.08.24Died:1980.06.03 († 90)Coadjutor Bishop-Prelate of Rio Negro (Brazil) (1962.05.21 – 1967.06.13)Titular Bishop of Cœla (1962.05.21 – 1980.06.03) |
| Archbishop Giovanni Marchetti Born:1753.04.10 (Italy)Ordained Priest:1777.12.20Consecrated Bishop:1814.10.02Died:1829.11.15 († 76)Titular Archbishop of Ancyra (1814.09.26 – 1829.11.15) |
| Archbishop Ambrogio Marchioni Born:1911.08.31 (Italy)Ordained Priest:1934.05.26Consecrated Bishop:1961.11.12Died:1989.02.27 († 77)Apostolic Nuncio to El Salvador (1959 – 1964)Apostolic Nuncio to Guatemala (1959 – 1964)Titular Archbishop of Severiana (1961.10.14 – 1989.02.27)Apostolic Nuncio to Switzerland (1967.06.30 – 1984) |
 Bishop Polikarp Antoni Augustyn Marciejewski Born:1761.01.23Ordained Priest:1784.02.08Consecrated Bishop:1819.09.19Died:1827.10.19 († 66)Titular Bishop of Argos (1819.06.04 – 1827.10.19)Auxiliary Bishop of Łomża (Poland) (1819.06.04 – 1827.10.19) |
 Bishop Roman Adam Marcinkowski (82) Titular Bishop of Bulla regiaAuxiliary Bishop emeritus of Płock (Poland)Euntes doceteBorn:1942.02.28 (Szczutowo, Poland)Ordained Priest:1965.06.13Consecrated Bishop:1985.04.13Priest of Płock (Poland) (1965.06.13 – 1985.02.23)Auxiliary Bishop of Płock (Poland) (1985.02.23 – 2017.04.13)Titular Bishop of Bulla regia (1985.02.23 – ...) |
 Archbishop Paul Casimir Marcinkus |
| Bishop Dominic Anthony Marconi (97) Titular Bishop of BureAuxiliary Bishop emeritus of Newark (USA)Born:1927.03.13 (Newark, NJ, USA)Ordained Priest:1953.05.30Consecrated Bishop:1976.06.25Priest of Newark (USA) (1953.05.30 – 1976.05.03)Auxiliary Bishop of Newark (USA) (1976.05.03 – 2002.07.01)Titular Bishop of Bure (1976.05.03 – ...) |
 Archbishop Nicola Marconi, O.F.M. Born:1842.05.18 (Italy)Consecrated Bishop:1891.05.07Died:1930.04.11 († 87)Bishop of Pult (Albania) (1890.12.23 – 1911.01.21)Titular Archbishop of Theodosiopolis (1911.01.21 – 1930.04.11) |
 Bishop Giacinto-Boulos Marcuzzo (79) Titular Bishop of EmmaüsAuxiliary Bishop emeritus of Jerusalem (Palestine)Born:1945.04.24 (San Polo di Piave, Italy)Ordained Priest:1969.06.22Consecrated Bishop:1993.07.03Priest of Jerusalem (Palestine) (1969.06.22 – 1993.04.29)Titular Bishop of Siminina (1993.04.29 – 1994.10.29)Auxiliary Bishop of Jerusalem (Palestine) (1993.04.29 – 2020.08.29)Titular Bishop of Emmaüs (1994.10.29 – ...) |
 Bishop Marek Marczak (55) Titular Bishop of LentiniAuxiliary Bishop of Łódź (Poland)General Secretary of Episcopal Conference of PolandDominus lux meaBorn:1969.02.17 (Piotrków Trybunalski, Poland)Ordained Priest:1994.06.11Consecrated Bishop:2015.04.11Priest of Łódź (Poland) (1994.06.11 – 2015.02.28)Titular Bishop of Lentini (2015.02.28 – ...)Auxiliary Bishop of Łódź (Poland) (2015.02.28 – ...)General Secretary of Episcopal Conference of Poland (2024.06.10 – ...) |
| Bishop Józef Marek Veritati in caritateBorn:1930.03.10Ordained Priest:1957.06.23Consecrated Bishop:1973.12.27Died:1978.03.03 († 47)Titular Bishop of Tigillava (1973.11.01 – 1978.03.03)Auxiliary Bishop of Wrocław (Poland) (1973.11.01 – 1978.03.03) |
| Archbishop Giovanni Battista Marenco, S.D.B. |
| Archbishop Henri Louis Charles Maret Born:1805.04.20 (France)Ordained Priest:1830.06.05Consecrated Bishop:1861.08.25Died:1884.06.16 († 79)Titular Bishop of Sura (1861.07.22 – 1882.09.15)Titular Archbishop of Naupactus (1882.09.15 – 1884.06.16) |
 Bishop Ivan Marghitych (Ruthenian Rite) |
| Bishop Mauro Paolo Mari Born:1746.03.19 (Italy)Ordained Priest:1769.09.23Consecrated Bishop:1804.04.29Died:1814.12.28 († 68)Titular Bishop of Dora (1804.03.26 – 1814.12.28) |
| Bishop Benedetto Mariani Born:1830.07.06Ordained Priest:1858.09.18Consecrated Bishop:1881.08.14Died:1891.08.19 († 61)Titular Bishop of Samos (1881.08.04 – 1891.08.19)Auxiliary Bishop of Sabina (Italy) (1881.08.04 – 1891.08.19) |
| Archbishop Giovanni Mariani Born:1919.06.17 (Italy)Ordained Priest:1942.03.21Consecrated Bishop:1967.12.03Died:1991.01.23 († 71)Apostolic Delegate to Western Africa (1967.10.16 – 1973.10.17)Apostolic Pro-Nuncio to Senegal (1967.10.16 – 1975.01.11)Titular Archbishop of Missua (1967.10.16 – 1991.01.23)Apostolic Pro-Nuncio to Niger (1971.09.20 – 1975.01.11)Apostolic Pro-Nuncio to Dahomey (1972 – 1973.10.17)Apostolic Pro-Nuncio to Cote d’Ivoire (1972 – 1973.10.17)Apostolic Pro-Nuncio to Upper Volta (1973.10.17 – 1975.01.11)Apostolic Delegate to Mali (1973.10.17 – 1975.01.11)Apostolic Delegate to Mauritania (1973.10.17 – 1975.01.11)Apostolic Nuncio to Venezuela (1975.01.11 – 1978.01)Apostolic Pro-Nuncio to Greece (1980.04.25 – 1990.05.05) |
 Bishop Gábor Máriássy Born:1807.06.03Ordained Priest:1830.06.09Consecrated Bishop:1865.05.14Died:1871.10.26 († 64)Titular Bishop of Paleopolis (1865.03.27 – 1871.10.26)Auxiliary Bishop of Eger (Hungary) (1865.03.27 – 1871.10.26) |
| Bishop Joannes Paulus Maricone, C.R.S. Born:1682Ordained Priest:1706.09.18Consecrated Bishop:1729.08.24Titular Bishop of Hippus (1728.12.15 – ?) |
| Archbishop Giuseppe Marid (Maronite Rite) Consecrated Bishop:1855.11.04Died:1887Titular Archbishop of Arca of the Maronites (1855? – 1887) |
 Bishop Joseph-Tobie Mariétan, C.R.A. |
| Archbishop Étienne Marilley Born:1804.10.21Ordained Priest:1831.05.28Consecrated Bishop:1846.03.15Died:1889.01.17 († 84)Titular Bishop of Mylassa (1845.12.16 – 1846.01.19 not possessed)Auxiliary Bishop of Lausanne et Genève (Switzerland) (1845.12.16 – 1846.01.19 not possessed)Bishop of Lausanne et Genève (Switzerland) (1846.01.19 – 1879.11.17)Titular Archbishop of Myra (1883.08.09 – 1889.01.17) |
 Archbishop Alcide Giuseppe Marina, C.M. Born:1887.03.24 (Italy)Ordained Priest:1909.12.18Consecrated Bishop:1936.05.24Died:1950.09.18 († 63)Apostolic Delegate to Iran (1936.03.07 – 1945)Titular Archbishop of Heliopolis in Phœnicia (1936.03.07 – 1950.09.18)Apostolic Administrator of Constantinopole (Turkiye) (1945 – 1947.05.18)Apostolic Delegate to Turkiye (1945 – 1947.05.18)Apostolic Nuncio to Lebanon (1947.05.18 – 1950.09.18) |
| Bishop Antonio Marinari, O. Carm. Born:1605.01.10Ordained Priest:1628.04.08Consecrated Bishop:1667.02.13Died:1689.08.20 († 84)Titular Bishop of Thagaste (1667.02.07 – 1689.08.20)Auxiliary Bishop of Ostia–Velletri (Italy) (1667.02.07 – 1689.08.20) |
 Bishop Luis Marín de San Martín, O.S.A. (63) Titular Bishop of SulianaUndersecretary of General Secretariat of the SynodDeus caritas est |
| Bishop François Marinelli, O.E.S.A. |
| Archbishop Francesco Marini Bishop of Albenga (Italy) (1655.08.11 – 1666.03.29)Bishop of Molfetta (Italy) (1666.03.29 – 1670.10.06)Titular Archbishop of Amasea (1671.01.19 – 1686.04.27)Titular Archbishop of Theodosia (1686.04.27 – ?) |
| Bishop Giuseppe Maria Carlo Marini, O.E.S.A. Born:1692.03.05Ordained Priest:1715.03.16Consecrated Bishop:1754.07.25Died:1771.11.22 († 79)Titular Bishop of Thagaste (1754.07.22 – 1771.11.22) |
| Bishop Paolo di San Ginesio Marini, O.E.S.A. Consecrated Bishop:1455Died:1501Titular Bishop of Helenopolis (1455 – 1501)Auxiliary Bishop of Milano (Italy) (1455 – 1501) |
 Archbishop Piero Marini (82) Titular Archbishop of MartiranoPresident emeritus of Pontifical Committee for International Eucharistic CongressesFons vitæ |
 Archbishop Joseph Salvador Marino (71) Titular Archbishop of NatchitochesPresident emeritus of Pontifical Ecclesiastical AcademyBorn:1953.01.23 (Birmingham, AL, USA)Ordained Priest:1979.08.25Consecrated Bishop:2008.03.29Priest of Birmingham (USA) (1979.08.25 – 2008.01.12)Chaplain of His Holiness (1989.10.18 – 1998.06.14)Prelate of Honour of His Holiness (1998.06.14 – 2008.01.12)Apostolic Nuncio to Bangladesh (2008.01.12 – 2013.01.16)Titular Archbishop of Natchitoches (2008.01.12 – ...)Apostolic Nuncio to Malaysia (2013.01.16 – 2019.10.11)Apostolic Nuncio to Timor-Leste (2013.01.16 – 2019.10.11)Apostolic Delegate to Brunei (2013.01.16 – 2019.10.11)President of Pontifical Ecclesiastical Academy (2019.10.11 – 2023.01.23) |
 Archbishop Giovanni C. Luigi Marinoni, O.F.M. Cap. Born:1883.02.05 (Italy)Ordained Priest:1906.10.28Consecrated Bishop:1936.08.28Died:1970.08.05 († 87)Vicar Apostolic of Eritrea (Eritrea) (1936.07.21 – 1959.07.25)Titular Bishop of Pisita (1936.07.21 – 1961.08.12)Vicar Apostolic of Asmara (Eritrea) (1959.07.25 – 1961.08.12)Titular Archbishop of Amorium (1961.08.12 – 1970.08.05) |
 Bishop Max Takuira Matthew Mariu, S.M. Born:1952.08.12 (New Zealand)Ordained Priest:1977.04.30Consecrated Bishop:1988.03.19Died:2005.12.12 († 53)Titular Bishop of Decoriana (1988.01.30 – 2005.12.12)Auxiliary Bishop of Hamilton (New Zealand) (1988.01.30 – 2005.12.12) |
| Bishop Thomas Francis Markham Nil nisi teipsum DomineBorn:1891.03.22 (USA)Ordained Priest:1917.06.02Consecrated Bishop:1950.09.14Died:1952.07.09 († 61)Titular Bishop of Acalissus (1950.07.18 – 1952.07.09)Auxiliary Bishop of Boston (USA) (1950.07.18 – 1952.07.09) |
 Bishop Mariano Markovic, O.F.M. Born:1840.10.21Ordained Priest:1863.04.26Consecrated Bishop:1884.05.04Died:1912.06.20 († 71)Titular Bishop of Danaba-orum (1884.03.27 – 1912.06.20)Apostolic Administrator of Banjaluka (Bosnia and Herzegovina) (1884.03.27 – 1912.06.20) |
| Bishop Rafał Markowski (66) Titular Bishop of ObbaAuxiliary Bishop of Warszawa (Poland)Jezu, ufam TobieBorn:1958.04.16 (Józefów, Poland)Ordained Priest:1982.06.06Consecrated Bishop:2013.12.07Priest of Warszawa (Poland) (1982.06.06 – 2013.11.04)Titular Bishop of Obba (2013.11.04 – ...)Auxiliary Bishop of Warszawa (Poland) (2013.11.04 – ...) |
 Bishop Carlos Eduardo Márquez Delima (62) Titular Bishop of CefalaAuxiliary Bishop of Caracas (Venezuela)Dios es buenoBorn:1961.12.29 (Caracas, Venezuela)Ordained Priest:2003.07.25Consecrated Bishop:2022.03.12Priest of Caracas (Venezuela) (2003.07.25 – 2021.12.23)Titular Bishop of Cefala (2021.12.23 – ...)Auxiliary Bishop of Caracas (Venezuela) (2021.12.23 – ...) |
| Bishop Luis Alfonso Márquez Molina, C.I.M. (87) Titular Bishop of Turris rotundaAuxiliary Bishop emeritus of Mérida (Venezuela)Born:1936.12.17 (Tovar, Venezuela)Ordained Priest:1962.06.29Consecrated Bishop:2002.01.12Auxiliary Bishop of Mérida (Venezuela) (2001.10.18 – 2013.07.15)Titular Bishop of Turris rotunda (2001.10.18 – ...) |
| Archbishop Augustin Marre, O.C.S.O. Prodesse magis quam præesse |
 Bishop Godfried Marschall Favore et laboreBorn:1840.10.01 (Austria)Ordained Priest:1864.07.24Consecrated Bishop:1901.05.12Died:1911.03.23 († 70)Titular Bishop of Orthosia (1901.01.15 – 1911.03.23)Auxiliary Bishop of Wien (Austria) (1901.01.15 – 1911.03.23) |
| Bishop Philippe André Yves Marsset (67) Titular Bishop of ThibicaAuxiliary Bishop of Paris (France)C’est le SeigneurBorn:1957.09.30 (Lyon, France)Ordained Priest:1988.06.25Consecrated Bishop:2019.09.06Priest of Paris (France) (1988.06.25 – 2019.05.18)Titular Bishop of Thibica (2019.05.18 – ...)Auxiliary Bishop of Paris (France) (2019.05.18 – ...) |
| Bishop Benedetto Martiali |
| Archbishop Joan Martí i Alanis Born:1928.11.29 (Spain)Ordained Priest:1951.06.17Consecrated Bishop:1971.01.31Died:2009.10.11 († 80)Bishop of Urgell (Spain) (1970.11.25 – 2003.05.12)Archbishop ad personam (2001.06.25 – 2009.10.11) |
| Bishop Juan Martín Titular Bishop of Gabala (1513.11.04 – ?)Auxiliary Bishop of Urgell (Spain) (1513.11.04 – ?) |
 Bishop Luis Dario Martín (63) Titular Bishop of BisenzioAuxiliary Bishop of Santa Rosa (Argentina) |
| Bishop Bernardus Martineau Titular Bishop of Sabulon (1697.01.15 – ?) |
| Archbishop Elie Martineau Bishop of Luçon (France) (1418.12.05 – 1424.06.28)Titular Archbishop of Myra (1424.06.28 – ?) |
| Bishop Francesco Martinengo Born:1668.04.15 (Italy)Ordained Priest:1692.08.03Consecrated Bishop:1711.12.21Died:1746.03.25 († 77)Titular Bishop of Martiria (1711.10.19 – 1746.03.25)Auxiliary Bishop of Brescia (Italy) (1711.10.19 – 1746.03.25) |
| Bishop Juan Antonio Martínez Camino, S.J. (71) Titular Bishop of BigastroAuxiliary Bishop of Madrid (Spain)Nomini tuoBorn:1953.01.09 (Santa Cruz de Marcenado-Siero, Spain)Ordained Priest:1980.05.24Consecrated Bishop:2008.01.19General Secretary of Episcopal Conference of Spain (2003.06.18 – 2013.11.20)Titular Bishop of Bigastro (2007.11.17 – ...)Auxiliary Bishop of Madrid (Spain) (2007.11.17 – ...) |
| Bishop Jaime Martínez Casanat, O. Carm. Born: (Spain)Consecrated Bishop:1532.07.14Died:1559Auxiliary Bishop of Zaragoza (Spain) (1532.07.01 – 1559) |
 Bishop Francisco Javier Martínez Castillo (49) Titular Bishop of NepteAuxiliary Bishop of Puebla de los Ángeles (Mexico)Ut omnes ei feramus |
 Bishop Luis Mario Martínez de Lejarza Valle, S.J. Born:1922.12.16 (Bilbao, Spain)Ordained Priest:1955.07.30Consecrated Bishop:1968.03.25Died:1980.04.08 (Miami, FL, USA † 57)Titular Bishop of Tubunæ in Mauretania (1968.01.08 – 1980.04.08)Auxiliary Bishop of Guatemala (Guatemala) (1968.01.08 – 1980.04.08) |
| Bishop Jorge Martínez Martínez Born:1917.10.23 (Mexico)Ordained Priest:1958.10.26Consecrated Bishop:1971.07.16Died:1994.08.01 († 76)Titular Bishop of Macomades rusticiana (1971.06.05 – 1994.08.01)Auxiliary Bishop of México (Mexico) (1971.06.05 – 1994.08.01) |
| Bishop Enrique Alberto Martínez Ossola (72) Titular Bishop of AcquapendenteAuxiliary Bishop of Santiago del Estero (Argentina)Misericordia, justicia y paz |
| Bishop Rafael Francisco Martínez Sáinz Pro hominibus constitutusBorn:1935.09.29 (Mexico)Ordained Priest:1959.10.25Consecrated Bishop:2002.07.16Died:2016.11.06 († 81)Priest of Guadalajara (Mexico) (1959.10.25 – 2002.06.19)Auxiliary Bishop of Guadalajara (Mexico) (2002.06.19 – 2012.07.19)Titular Bishop of Dura (2002.06.19 – 2016.11.06) |
| Bishop Salvador Martinez Silva Born:1889.03.30 (Mexico)Ordained Priest:1912.10.30Consecrated Bishop:1940.12.11Died:1969.02.07 († 79)Titular Bishop of Jasus (1940.08.10 – 1969.02.07)Auxiliary Bishop of Zamora (Mexico) (1940.08.10 – 1969.02.07) |
 Archbishop Loudovico of St. Teresa Martini, O.C.D. Born:1809.03.01 (Italy)Ordained Priest:1832.09.29Consecrated Bishop:1839.11.10Died:1883.07.12 († 74)Coadjutor Vicar Apostolic of Verapoly (India) (1839.06.07 – 1844.12.07)Titular Bishop of Europus (1839.06.07 – 1845.09.30)Vicar Apostolic of Verapoly (India) (1844.12.07 – 1855.11.10)Titular Archbishop of Cyrrhus (1845.09.30 – 1883.07.12) |
| Bishop Vicente Martín Muñoz (55) Titular Bishop of VallipositaAuxiliary Bishop of Madrid (Spain)Deus caritas estBorn:1969.09.16 (La Nava de Santiago, Spain)Ordained Priest:1995.06.17Consecrated Bishop:2024.07.06Priest of Mérida–Badajoz (Spain) (1995.06.17 – 2024.04.23)Titular Bishop of Valliposita (2024.04.23 – ...)Auxiliary Bishop of Madrid (Spain) (2024.04.23 – ...) |
| Bishop Martino |
 Bishop Carlos Francisco Martins Pinheiro Born:1925.05.30 (Portugal)Ordained Priest:1951.07.08Consecrated Bishop:1985.04.28Died:2010.06.04 († 85)Auxiliary Bishop of Braga (Portugal) (1985.02.16 – 2000.11.10)Titular Bishop of Dume (1985.02.16 – 2010.06.04) |
| Bishop João Evangelista Martins Terra, S.J. Cum Christo et in EcclesiaBorn:1925.03.07 (Jardinópolis, SP, Brazil)Ordained Priest:1956.12.22Consecrated Bishop:1988.11.20Died:2022.03.11 (Brasília, France † 97)Auxiliary Bishop of Olinda e Recife (Brazil) (1988.08.17 – 1994.06.15)Titular Bishop of Bagis (1988.08.17 – 2022.03.11)Auxiliary Bishop of Brasília (Brazil) (1994.06.15 – 2004.06.16) |
 Archbishop Áron Márton Non recuso laborem |
| Bishop Levente Balázs Martos (50) Titular Bishop of TrebaAuxiliary Bishop of Esztergom–Budapest (Hungary)Veritatem diligis |
| Archbishop Miroslav Stefan Marusyn |
| Bishop Heinrich Marx Born:1835.01.03 (Poland)Ordained Priest:1858.06.12Consecrated Bishop:1900.06.26Died:1911.08.28 († 76)Titular Bishop of Colossæ (1900.03.11 – 1911.08.28)Auxiliary Bishop of Wrocław (Poland) (1900.03.11 – 1911.08.28) |
| Bishop Franz Xaver Anton Marxer Born:1704.05.20Ordained Priest:1728.05.22Consecrated Bishop:1748.05.26Died:1775.05.25 († 71)Titular Bishop of Chrysopolis in Arabia (1748.05.06 – 1775.05.25)Auxiliary Bishop of Wien (Austria) (1748.05.06 – 1775.05.25) |
| Bishop Giulio Marzi |
 Bishop Nino Marzoli, C.R. Born:1938.12.25 (Italy)Ordained Priest:1966.12.17Consecrated Bishop:1988.06.18Died:2000.05.24 († 61)Auxiliary Bishop of La Paz (Bolivia) (1988.04.16 – 1992.08.28)Titular Bishop of Nara (1988.04.16 – 2000.05.24)Auxiliary Bishop of Santa Cruz de la Sierra (Bolivia) (1992.08.28 – 2000.05.24) |