Names
- Mills, Julia H.1
- Morrill, Justin Smith, 1810-1898.1
- Mosher, Eliza Maria, 1846-19281
- Mr. Curt (Musical group)1
- Ohio State University.1
- Olney, Clyde Charles, 1880-19661
- Olney, Richard, 1835-1917.1
- Osborn, Chase S. (Chase Salmon), 1860-1
- Osborn, Chase Salmon, 1860-1949.1
- Page, Herman, 1866-1942.1
- Palmer, Alice Freeman, 1855-1902.1
- Palmer, Thomas Witherell, 1830-1913.1
- Palmer, Thomas Witheroll, 1830-1913.1
- Patton, Carl S. (Carl Safford), 1866-1939.1
- Patton, Carl Safford, 1866-1939.1
- Paul, Ray.1
- Phifer, Kenneth W.1
- Pinchot, Gifford, 1865-1946.1
- Pingree, Hazen S., 1840-1901.1
- Pingree, Hazen Smith, 1840-1901.1