- Marmion, Nicholas (d. 1883)1
- Martin family.1
- Martin, Elma H.1
- Mathers, Max1
- Maxwell family1
- McCabe, Brooks F., Jr., 1949-1
- McChesney, James Z.1
- McKown, Sarah Morgan1
- Monroe, Victorine Louistall, 1912-20061
- Montague, Margaret Prescott, 1878-19551
- Morton, John1
- Mugler, Henri Jean1