Oeco - outb
- Orta, Lake
- Ortega (Saavedra), (José) Daniel
- Ortega Saavedra
- Ortega Spottorno, Jose
- Ortega y Gasset
- Ortega y Gasset, José
- Ortega, Amancio
- Ortega, Daniel
- Ortega, Domingo
- Ortega,Daniel
- Ortegal
- Ortelius, Abraham
- Ortese, Anna Maria
- orth-
- Orth.
- orth.
- orthicon
- ortho
- ortho-
- ortho-cousin