Loui - Mail
- Machabees, The Books of
- Machabeus, Judas
- MacHale, John
- Machiavelli
- Machpelah
- Machutus, Saint
- Mackenzie
- Maclovius, Saint
- MacMahon, Heber
- MacMahon, Marie-Edmé-Patrice-Maurice de
- MacNeven, William James
- Mâcon, Ancient Diocese of
- Macri
- Macrina the Elder, Saint
- Macrina the Younger, Saint
- Mactaris
- Mactaris, Titular See of
- Madagascar
- Madame de Sevigne
- Madame Guyon
- Madaurus
- Maderna, Carlo
- Maderno, Stefano
- Madianites
- Madianites (Midianites)
- Madras
- Madrid-Alcalá
- Madruzzi, Christopher
- Madura Mission
- Maedoc, Saint
- Maelbrighte O'Hussey
- Maelruan, Saint
- Maelrubha, Saint
- Maerlant, Jacob van
- Maestro di Camera del Papa
- Maffei, Bernardino
- Maffei, Francesco
- Maffei, Marchese Francesco Scipione
- Maffei, Raffaelo
- Maffeo Vegio
