| Name | Meaning | Gender | Origin |
|---|
| Nilson | | Unisex | Hebrew |
| Odin | Viking mythology: the allmighty god | Male | Old |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Orman | spearman | Unisex | |
| Osborn | Soldier of God | Male | English |
| Osborne | soldier of God | Unisex | |
| Oscar | God's spear.
| Male | English |
| Owen | Young fighter
| Male | Welsh |
| Page | young attendant | Male | |
| Patton | fighter's town | Male | English |
| Percival | Hero of several Arthurian stories
| Male | |
| Peyton | From The Fighter's Farm | Female | English |
| Pike | pike, a fish | Male | |
| Pilot | | Male | |
| Porthos | | Male | |
| Ransom | son of the shield; redeemer | Male | English |
| Rebel | One that resists of defies authority | Male | Word |
| Rice | | Unisex | |
| Richard | powerful ruler; brave one | Male | |
| Rider | horseman | Male | English |
| Riley | courageous | Female | Irish |
| Rocket | To move swiftly and powerfully | Male | Word |
| Rodeo | | Unisex | Hebrew |
| Roger | famous spearman, quiet | Male | |
| Romeo | pilgrim to Rome | Male | Italian |