These names are adopting in Ireland and that is the way these are so popular in this country. See full list of Girls, Boys and Transgenders Baby Name Famous in Ireland Country.
| Name | Meaning | Details |
|---|---|---|
| Odell | From The Woad Hill | View Details |
| Odo | Ric | View Details |
| Odón | Ric | View Details |
| Ogden | From The Oak Valley | View Details |
| Oisin | Little Deer | View Details |
| Oistin | Venerable | View Details |
| Oliva | Elf Army | View Details |
| Olive | Olive Or From The Olive Tree | View Details |
| Oliver | Descendant Of The Ancestor | View Details |
| Olivia | "Ancestors Descendant" | View Details |
| Ollie | Elf Army | View Details |
| Onyx | Black Gemstone | View Details |
| Oona | One | View Details |
| Oran | Green | View Details |
| Orchid | Flowering Plant | View Details |