Names
- National Science Foundation (U.S.)1
- Nelson, J. Raleigh (Joseph Raleigh)1
- Newcombe, Frederick Charles, 1858-1927.1
- Newkirk, Henry Wirt, 1854-1946.1
- Nicholson, Seth B. (Seth Barnes), 1891-1963.1
- Nicholson, Seth Barnes, 1891-1
- Norton, William J. (William John), 1883-1975.1
- Novy, Frederick George, 1864-1957.1
- Odegaard, Charles E.1
- Okkelberg, Peter Olaus, 1880-1
- Ormondroyd, J. (Jesse), 1897-1
- Orr, H. Winnett (Hiram Winnett), 1877-1956.1
- Osborn, Chase S. (Chase Salmon), 18601
- Osborn, Chase S. (Chase Salmon), 1860-1
- Otis, Robert Burns, 1879-1
- Parker, Edward Foster.1
- Patterson, Robert Porter, 1891-1952.1
- Patton, Carl S. (Carl Safford), 1866-1939.1
- Patton, Carl S. (Carl Safford), 1891-1952.1
- Perkins, John A. (John Alanson), 1914-1