Encyclopedias, Almanacs, Transcripts, and Maps
- Mattiah (Mattityahu) ben Ḥeresh
- Mattias, Maria de, Bl.
- Mattnah
- Mattuck, Israel I
- Matulaitis-Matulewicz, Jurgis, Bl.
- Maturidi, Al- (?–944)
- Maturin, Basil William
- Matz, Israel
- Matzenauer, Margarete
- Maubuisson, Abbey of
- Maududi, Abu L-A?la? (1903–1979)
- Maunoir, Julien, Bl.
- Maurice of Carnoët, St.
- Maurice of Sully
- Maurice, Byzantine Emperor
- Maurin, Aristide Peter
- Maurists
- Mauritania, The Catholic Church in
- Mauritius, The Catholic Church in
- Maurras, Charles