Names
- Noble, Gladwyn Kingsley, 1894-1940.1
- O'Brien, Patrick Henry, 1868-1
- O'Brien, Patrick Henry, 1868-1959.1
- O'Hara, John J., 1885-1
- Okkelberg, Peter Olaus, 1880-1
- Olds, Ransom Eli, 1864-1950.1
- Osborn, Chase S. (Chase Salmon), b. 1860.1
- Page, Herman, 1866-1942.1
- Paxson, Frederic L. (Frederic Logan), 1877-1948.1
- Peale, Norman Vincent, 1898-1993.1
- Pearse, A. S. (Arthur Sperry), 1877-1956.1
- Peckham, Howard H. (Howard Henry), 1910-1995.1
- Perkins, Frances, 1880-1965.1
- Person, Seymour Howe, 1879-1957.1
- Peterson, Enoch Ernest, 1891-1
- Peterson, Reuben, 1862-1942.1
- Phillips, Ulrich Bonnell, 1877-1934.1
- Piggins, Edward S.1
- Piggins, Edward S., -1972.1
- Pinchot, Gifford, 1865-1946.1