- Majolus, Saint, Abbot of Cluny, approximately 906-9941
- Malikites1
- Manuscripts, Catalan1
- Manuscripts, German1
- Manuscripts, Persian1
- Manuscripts, Renaissance1
- Manuscripts, Spanish1
- Marina, Saint1
- Mark, Saint1
- Marriage1
- Marriage (Islamic law)1
- Marriage (Jewish law)1
- Marriage service (Judaism)1
- Marriage--Moral and ethical aspects1
- Martyrologies1
- Masorsah1
- Massachusetts--Wellesley1
- Mathematics, Arab1
- Maurice, Saint, -approximately 2871
- Maximus, of Turin, Saint, active 4th century-5th century1