| Name | M/F | Meaning |
|---|---|---|
| Omawnakw | ![]() |
Meaning : Cloud Feather. Used in : Native American |
| Ondyaw | ![]() |
Meaning : Legendary Son Of A French Duke. Used in : Welsh |
| Ongentheow | ![]() |
Meaning : Used in : British, English |
| Onslow | ![]() |
Meaning : From The Zealous One's Hill Used in : American, British, English |
| Oslow | ![]() |
Meaning : Used in : British, English |
| Ounslow | ![]() |
Meaning : From The Enthusiast's Hill. Used in : British, English |