| Artist | Titles | 1.
| Otis, George Demont, 1879-1962, painter. | 121 | 2.
| Otis, Marion, painter. | 1 | 3.
| Otis, Ray, painter. | 1 | 4.
| O'Toole, Edward, contractor. | 1 | 5.
| O'Toole, John, painter. (attributed to) | 1 | 6.
| O'Toole, Kevin, sculptor. | 1 | 7.
| O'Toole, painter. | 1 | 8.
| Ott and Brewer, fabricator. | 0 | 9.
| See: Ott & Brewer, fabricator. | 2 | 10.
| Ott & Brewer, fabricator. | 2 | 11.
| Ott, Charles, sculptor. | 1 |
|