English boys names starting with the letter O. Discover the meaning and popularity of these names including the names Oliver, Oscar, Ollie and much more.
| Name | Description | Popularity |
| Obadiah | Servant of God | * |
| Oliver | English male name derived from the olive tree | ***** |
| Ollie | Pet name for Oliver | **** |
| Omar | Biblical name | * |
| Orson | Means like the Bear cub | * |
| Orville | Created by Fanny Burney | * |
| Osbert | Famous/Bright God | * |
| Oscar | Means deers’ friend | **** |
| Osmond | Means God’s protector | ** |
| Oswald | God’s rule | ** |
| Otis | Son of Ote | * |
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