Surnames Ortzow - Osak
- Ortzow (3 records)
- Oru (1 records)
- Orue (5 records)
- Orueta (1 records)
- Orullian (3 records)
- Orum (52 records)
- Orun (1 records)
- Orund (1 records)
- Orup (1 records)
- Orvananos (1 records)
- Orvas (1 records)
- Orvedahl (5 records)
- Orven (2 records)
- Orvert (1 records)
- Orvick (10 records)
- Orvik (10 records)
- Orville (3 records)
- Orvin (2 records)
- Orvis (57 records)
- Orviss (5 records)
- Orvold (1 records)
- Orwan (4 records)
- Orwant (1 records)
- Orwell (2 records)
- Orwen (1 records)
- Orwick (10 records)
- Orwicz (1 records)
- Orwig (67 records)
- Orwin (6 records)
- Orwitz (8 records)
- Orwoll (7 records)
- Ory (17 records)
- Oryall (6 records)
- Oryan (24 records)
- Orychiwski (1 records)
- Orye (2 records)
- Oryl (1 records)
- Orynicz (1 records)
- Orynski (4 records)
- Orystick (1 records)
- Orystuck (2 records)
- Orza (5 records)
- Orzal (1 records)
- Orzali (1 records)
- Orzalli (31 records)
- Orzanco (1 records)
- Orzano (1 records)
- Orzazewski (2 records)
- Orzchowski (2 records)
- Orzco (1 records)
- Orze (2 records)
- Orzech (8 records)
- Orzechowski (9 records)
- Orzeck (1 records)
- Orzehoski (1 records)
- Orzehowski (2 records)
- Orzel (14 records)
- Orzell (2 records)
- Orzen (6 records)
- Orzero (1 records)
- Orzevsky (1 records)
- Orzhekhovskaya (1 records)
- Orzhel (1 records)
- Orzilli (1 records)
- Orzio (1 records)
- Orzo (1 records)
- Orzoff (4 records)
- Orzol (1 records)
- Orzolek (1 records)
- Orzua (2 records)
- Orzuachavez (1 records)
- Orzulak (2 records)
- Osa (23 records)
- Osaben (1 records)
- Osacho (1 records)
- Osada (10 records)
- Osadadecasuyon (1 records)
- Osadchaya (2 records)
- Osadchey (2 records)
- Osadchik (2 records)
- Osadchuk (1 records)
- Osadebay (1 records)
- Osadehey (1 records)
- Osadtchi (1 records)
- Osadzuk (4 records)
- Osaeta (1 records)
- Osage (4 records)
- Osagiede (1 records)
- Osai (2 records)
- Osaile (1 records)
- Osajack (1 records)
- Osajima (5 records)
- Osak (7 records)