| Bishops |
 Bishop Gyözö Simon Macalik
| Born: | 1890.03.01 (Romania) | | Ordained Priest: | 1915.07.15 | | Consecrated Bishop: | 1951 | | Died: | 1953.08.19 († 63) |
| Titular Bishop of Azotus (1951 – 1953.08.19) Auxiliary Bishop of Alba Iulia (Romania) (1951 – 1953.08.19) |
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  Bishop Christie Albert Macaluso (78)
Titular Bishop of Grass Valley
Auxiliary Bishop emeritus of Hartford (USA)
Veritas liberabit vos | Born: | 1945.06.12 (Hartford, CT, USA) | | Ordained Priest: | 1971.05.21 | | Consecrated Bishop: | 1997.06.10 |
| Priest of Hartford (USA) (1971.05.21 – 1997.03.18) Auxiliary Bishop of Hartford (USA) (1997.03.18 – 2017.12.15) Titular Bishop of Grass Valley (1997.03.18 – ...) |
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 Bishop Florence MacCarthy
| Born: | 1762 (Ireland) | | Died: | 1810 († 48) |
| Titular Bishop of Antinœ (1803.03.06 – 1810) Coadjutor Bishop of Cork (Ireland) (1803.03.06 – 1810) |
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 Archbishop Giuseppe Macchi
| Born: | 1845.07.10 (Palestrina, Italy) | | Ordained Priest: | 1868.04.11 | | Consecrated Bishop: | 1880.03.14 | | Died: | 1906.06.08 (Lisboa, Portugal † 60) |
| Priest of Palestrina (Italy) (1868.04.11 – 1880.02.27) Titular Bishop of Gadaræ (1880.02.27 – 1889.04.09) Auxiliary Bishop of Palestrina (Italy) (1880.02.27 – 1889.04.09) Titular Archbishop of Amasea (1889.04.09 – 1897.08.19) Apostolic Delegate to Bolivia (1889.04.12 – 1897.08.02) Apostolic Delegate to Ecuador (1889.04.12 – 1897.08.02) Apostolic Delegate to Peru and Bolivia (1889.04.12 – 1897.08.02) Apostolic Internuncio to Brazil (1897.08.02 – 1901.02.14) Titular Archbishop of Thessalonica (1897.08.19 – 1906.06.08) Apostolic Nuncio to Brazil (1901.02.14 – 1902.07.21) Apostolic Nuncio to Bavaria (1902.07.21 – 1904.01.06) Apostolic Nuncio to Portugal (1904.01.06 – 1906.06.08) |
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 Archbishop Ronald MacDonald
| Born: | 1835.06.02 (Canada) | | Ordained Priest: | 1859.10.02 | | Consecrated Bishop: | 1881.08.21 | | Died: | 1912.09.17 († 77) |
| Bishop of Harbour Grace (Canada) (1881.05.24 – 1906.09.03) Titular Archbishop of Gortyna (1906.09.03 – 1912.09.17) |
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Bishop Teodor Machciński | Born: | 1681.10 | | Ordained Priest: | 1706.12.08 |
| Titular Bishop of Paleopolis (1730.02.08 – ?) |
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 Bishop Heinrich Machens
| Born: | 1919.01.25 (Germany) | | Ordained Priest: | 1949.03.13 | | Consecrated Bishop: | 1976.06.07 | | Died: | 2001.02.17 († 82) |
| Auxiliary Bishop of Hildesheim (Germany) (1976.03.24 – 1994.02.11) Titular Bishop of Bida (1976.03.24 – 2001.02.17) |
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Archbishop Joseph Godehard Machens | Born: | 1886.08.29 (Germany) | | Ordained Priest: | 1911.03.19 | | Consecrated Bishop: | 1934.07.25 | | Died: | 1956.08.14 († 69) |
| Bishop of Hildesheim (Germany) (1934.06.22 – 1956.08.14) Archbishop ad personam (1956 – 1956.08.14) |
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 Bishop Antonio Cayetano Maciel Calheiros
| Born: | 1734.06.25 (Vianna, Portugal) | | Ordained Priest: | 1767.08.23 | | Died: | 1819? († 85) |
| Titular Bishop of Lacedæmon (1780.09.18 – 1819?) Auxiliary Bishop of Lisboa (Portugal) (1780.09.18 – 1819?) |
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Archbishop Alessandro Macioti | Born: | 1798.08.29 (Italy) | | Ordained Priest: | 1821.04.21 | | Consecrated Bishop: | 1845.10.05 | | Died: | 1859.01.18 († 60) |
| Titular Archbishop of Colossæ (1845.09.26 – 1859.01.18) Apostolic Nuncio to Switzerland (1845.09.30 – 1856.04.11) |
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Bishop Geraldo Maciotti | Born: | 1768.12.02 (Italy) | | Ordained Priest: | 1791.09.24 | | Died: | 1837? († 69) |
| Titular Bishop of Elusa (1807.03.23 – 1837?) Auxiliary Bishop of Ostia–Velletri (Italy) (1807.03.23 – 1837?) |
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Bishop Eric Francis MacKenzie Pax diligentibus Legem | Born: | 1894.12.06 (USA) | | Ordained Priest: | 1918.10.20 | | Consecrated Bishop: | 1950.09.14 | | Died: | 1969.08.20 († 74) |
| Titular Bishop of Alba (1950.07.11 – 1969.08.20) Auxiliary Bishop of Boston (USA) (1950.07.11 – 1969.08.20) |
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 Archbishop Donald Louis Mackintosh
| Born: | 1844.12.24 (Scotland) | | Ordained Priest: | 1871.05.31 | | Consecrated Bishop: | 1912.07.02 | | Died: | 1919.10.08 († 74) |
| Titular Archbishop of Chersona (1912.06.11 – 1919.10.08) Coadjutor Archbishop of Glasgow (Scotland) (1912.06.11 – 1919.10.08) |
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Saint Bishop Óengus mac Óengobann (Aengus) | Born: | (Clonenagh, Ireland) | | Died: | 824.03.11 |
| Bishop. |
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 Bishop Jan Madaliński, O. Cist.
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  Bishop Thaddeus Ma Da-qin (馬達欽) (55)
Auxiliary Bishop of Shanghai 上海 (China)
Ut sint unum ad majorem Dei gloriam / 同心合一，愈顯主榮 | Born: | 1968 (Shanghai, 上海, China) | | Ordained Priest: | 1994.12.18 | | Consecrated Bishop: | 2012.07.07 |
| Coadjutor Bishop of Shanghai 上海 (China) (2012 – 2012.12▼) Auxiliary Bishop of Shanghai 上海 (China) (2012 – ...) |
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 Bishop Justin Alexander Madathiparambil (52)
Titular Bishop of Lysinia
Auxiliary Bishop of Vijayapuram (India)
| Born: | 1972.04.06 (Pambanar, India) | | Ordained Priest: | 1996.12.27 | | Consecrated Bishop: | 2024.02.12 |
| Priest of Vijayapuram (India) (1996.12.27 – 2024.01.13) Titular Bishop of Lysinia (2024.01.13 – ...) Auxiliary Bishop of Vijayapuram (India) (2024.01.13 – ...) |
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Bishop Denis James Madden (84) Titular Bishop of Baia
Auxiliary Bishop emeritus of Baltimore (USA)
In all things may God be glorified | Born: | 1940.03.08 (Carbondale, PA, USA) | | Ordained Priest: | 1967.04.01 | | Consecrated Bishop: | 2005.08.24 |
| Priest of Baltimore (USA) (1967.04.01 – 2005.05.10) Prelate of Honour of His Holiness (1997.10.26 – 2005.05.10) Auxiliary Bishop of Baltimore (USA) (2005.05.10 – 2016.12.05) Titular Bishop of Baia (2005.05.10 – ...) |
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Bishop Wilhelm Mader, O. Praem. |
Archbishop Ambrose Madtha (安博思) Ut vitam abundantius habeant | Born: | 1955.11.02 (India) | | Ordained Priest: | 1982.03.28 | | Consecrated Bishop: | 2008.07.29 | | Died: | 2012.12.08 († 57) |
| Priest of Lucknow (India) (1982.03.28 – 2008.05.08) Chaplain of His Holiness (1991.10.08 – 2000.07.28) Prelate of Honour of His Holiness (2000.07.28 – 2008.05.08) Chargé d’affaires in China (2003.02.11 – 2008.05.08) Titular Archbishop of Naissus (2008.05.08 – 2012.12.08) Apostolic Nuncio to Cote d’Ivoire (2008.05.08 – 2012.12.08) |
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 Bishop Benito Madueño y Ramos
| Born: | 1654 (Spain) | | Died: | 1739.05.11 († 84) |
| Titular Bishop of Sion (1698.12.19 – 1739.05.11) Auxiliary Bishop of Toledo (Spain) (1698.12.19 – 1739.05.11) |
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Archbishop Francesco Maffei | Born: | 1855.11.22 (Italy) | | Consecrated Bishop: | 1916.10.08 | | Died: | 1937.10.25 († 81) |
| Bishop of Lacedonia (Italy) (1916.05.22 – 1926.06.24) Titular Archbishop of Limisa (1926.06.24 – 1937.10.25) |
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 Bishop Edward Maginn
| Born: | 1802.12.16 | | Ordained Priest: | 1825 | | Consecrated Bishop: | 1846.01.18 | | Died: | 1849.01.17 († 46) |
| Titular Bishop of Orthosia (1845.09.30 – 1849.01.17) Coadjutor Bishop of Derry (Northern Ireland) (1845.09.30 – 1849.01.17) |
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Bishop Edward Joseph Maginn | Born: | 1897.01.04 (Scotland) | | Ordained Priest: | 1922.06.10 | | Consecrated Bishop: | 1957.09.12 | | Died: | 1984.08.21 († 87) |
| Auxiliary Bishop of Albany (USA) (1957.06.27 – 1972.07.08) Titular Bishop of Curium (1957.06.27 – 1984.08.21) |
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Bishop Robert Patrick Maginnis Stay with us Lord | Born: | 1933.12.22 (Philadelphia, PA, USA) | | Ordained Priest: | 1961.05.13 | | Consecrated Bishop: | 1996.03.11 | | Died: | 2022.09.14 (Darby, PA, USA † 88) |
| Auxiliary Bishop of Philadelphia (USA) (1996.01.24 – 2010.06.08) Titular Bishop of Siminina (1996.01.24 – 2022.09.14) |
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Archbishop Pietro Maglione |
Bishop Stephanus Magnani, O.F.M. | Titular Bishop of Troas (1519.03.23 – 1523?) |
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Bishop Vincenzo Magnati | Born: | 1644.09 (Italy) | | Ordained Priest: | 1668.07.29 |
| Titular Bishop of Megara (1727.03.17 – ?) |
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 Bishop Valter Magno de Carvalho (51)
Titular Bishop of Giufi
Auxiliary Bishop of São Salvador da Bahia (Brazil)
In verbo tuo | Born: | 1973.02.22 (Capela Nova, MG, Brazil) | | Ordained Priest: | 1997.08.23 | | Consecrated Bishop: | 2021.01.23 |
| Priest of Mariana (Brazil) (1997.08.23 – 2020.11.04) Titular Bishop of Giufi (2020.11.04 – ...) Auxiliary Bishop of São Salvador da Bahia (Brazil) (2020.11.04 – ...) |
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Archbishop Antonio Magnoni |
Bishop Petrus Magnye Titular Bishop of Paneade (1784.09.28 – ?) |
 Bishop Stanislaus Tobias Magombo
| Born: | 1968.02.24 (Malawi) | | Ordained Priest: | 1996.08.03 | | Consecrated Bishop: | 2009.07.11 | | Died: | 2010.07.06 († 42) |
| Priest of Dedza (Malawi) (1996.08.03 – 2009.04.29) Titular Bishop of Cesarea in Mauretania (2009.04.29 – 2010.07.06) Auxiliary Bishop of Lilongwe (Malawi) (2009.04.29 – 2010.07.06) |
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Bishop Pietro Magri |
Bishop James Maguire | Born: | 1882.08.29 (Scotland) | | Ordained Priest: | 1906.07.22 | | Consecrated Bishop: | 1939.11.30 | | Died: | 1944.10.10 († 62) |
| Titular Bishop of Ilium (1939.10.05 – 1944.10.10) Coadjutor Bishop of Dunkeld (Scotland) (1939.10.05 – 1944.10.10) |
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Archbishop John Joseph Maguire Tutam reclude semitam | Born: | 1904.12.11 (New York, NY, USA) | | Ordained Priest: | 1928.12.22 | | Consecrated Bishop: | 1959.06.29 | | Died: | 1989.07.06 († 84) |
| Titular Bishop of Antiphræ (1959.05.16 – 1965.09.15) Auxiliary Bishop of New York (USA) (1959.05.16 – 1965.09.15) Coadjutor Archbishop of New York (USA) (1965.09.15 – 1980.01.08) Titular Archbishop of Tabalta (1965.09.15 – 1989.07.06) |
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Bishop Patrick Maguire, O.F.M. |
 Bishop Gerald Mahon, M.H.M.
| Born: | 1922.05.04 (England) | | Ordained Priest: | 1946.07.14 | | Consecrated Bishop: | 1970.05.23 | | Died: | 1992.01.29 († 69) |
| Titular Bishop of Eanach Dúin (1970.04.24 – 1992.01.29) Auxiliary Bishop of Westminster (England) (1970.04.24 – 1992.01.29) |
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Bishop James Patrick Mahoney | Born: | 1925.08.16 (Kingston, ON, Canada) | | Ordained Priest: | 1951.05.19 | | Consecrated Bishop: | 1972.09.15 | | Died: | 2002.06.01 († 76) |
| Auxiliary Bishop of New York (USA) (1972.07.25 – 1997.05.10) Titular Bishop of Ipagro (1972.07.25 – 2002.06.01) |
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Archbishop Carlo Maielli | Born: | 1669.03.18 (Italy) | | Ordained Priest: | 1693.03.21 | | Consecrated Bishop: | 1724.09.21 | | Died: | 1739 († 70) |
| Titular Archbishop of Hemesa (1724.09.11 – 1739) |
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Bishop Augustin Mair, C.R.S.A. | Born: | 1485 | | Ordained Priest: | 1521 | | Consecrated Bishop: | 1523.12.13 | | Died: | 1543.11.25 († 57) |
| Auxiliary Bishop of Freising (Germany) (1523.06.08 – 1527.03) Titular Bishop of Salona (1523.06.08 – 1543.11.25) Auxiliary Bishop of Basel (Switzerland) (1527.03 – 1536.10) Auxiliary Bishop of Würzburg (Germany) (1536.10 – 1543.11.25) |
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Bishop Konrad Mair | Titular Bishop of Saldæ (1517.07.21 – 1522) Auxiliary Bishop of Freising (Germany) (1517.07.21 – 1522) |
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 Bishop Jacques Maistret, O. Carm.
| Born: | 1534 | | Consecrated Bishop: | 1574.12.27 | | Died: | 1616 († 82) |
| Titular Bishop of Damascus (1574.11.17 – 1616) Auxiliary Bishop of Lyon (France) (1574.11.17 – 1616) |
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 Bishop Marco Antonio Maiz
| Born: | 1782.04.25 | | Ordained Priest: | 1808.03.16 | | Consecrated Bishop: | 1845.08.31 | | Died: | 1848.05.15 († 66) |
| Titular Bishop of Rhithymna (1844.07.25 – 1848.05.15) Auxiliary Bishop of Paraguay (Paraguay) (1844.07.25 – 1848.05.15) |
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