Persons
- Mercier Charles
- Merkt Andreas
- Merx Adalbert
- Mingana Alphonse
- Mistrich V.
- Mistrih Vincent
- Molitor Joseph
- Mosikyan Karine
- Munitiz Joseph A.
- Mutafian Claude
- Muyldermans Joseph
- Müller Caspar Detlef Gustav
- Müller F. S.
- Nau François
- Neumann Günter
- Novák Petr
- Nève Félix Jean Baptiste
- Orengo Alessandro
- Ostrovsky Alexey
- Outtier Bernard
- Pagani Lara
- Panayotov Alexander
- Panteleev Sergey
- Parmentier Martien F. G.
- Pataridze Tamara