| Name | M/F | Meaning |
|---|---|---|
| Oidhche | ![]() |
Meaning : Night Used in : Scottish |
| Oikka | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Oikki | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Oikku | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Oilibhear | ![]() |
Meaning : Relic, Heir To His Ancestors Used in : Irish, Norse |
| Oilleog | ![]() |
Meaning : A Sprite, Elf Used in : Irish |
| Oippo | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Oisin | ![]() |
Meaning : In irish meaning is : Little, freckled Used in : Australian, Celtic, Irish |
| Oison | ![]() |
Meaning : A Deer Used in : Irish |
| Oissene | ![]() |
Meaning : A Deer Used in : Irish |
| Oissine | ![]() |
Meaning : A Deer Used in : Irish |
| Oistin | ![]() |
Meaning : Venerable Origin Latin Used in : Hindu, Irish, Irish, Latin |
| Oitsa | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Oiva | ![]() |
Meaning : Excellent Used in : Finnish |