| Ouein | Greek origin, meaning 'good' or 'beautiful' |
| Oughtred | Old English, meaning 'brave counsel' or 'strong advice' |
| Owaine | Youth; Lamb; Yahweh is Gracious |
| Oxforde | Place name origin, meaning 'ox ford' or 'ford of oxen' |
| Ozwell | Old English, possibly meaning 'divine well' or 'well of God' |
| Babba | A term for a beloved father. |
| Bacca | From the beech tree |
| Bacga | From the beech tree |
| Badanoth | From the beech tree or beech wood |
| Badeca | From the beech tree |
| Badouim | From the beech tree or beech wood |
| Badulf | Ruler of the wolf |
| Baecci | From the beech tree or beech wood |
| Baeddel | From the Old English 'bæddel,' meaning 'battle' or 'warrior.' |
| Baeddi | Derived from the Old English 'bæddi,' meaning 'warrior' or 'fighter.' |
| Baegi | Possibly derived from the Old English 'bæg,' meaning 'battle' or 'war.' |
| Baegloc | From the Old English 'bægloc,' meaning 'battle' or 'warrior.' |
| Baeldaeg | From the Old English 'bældæg,' meaning 'battle day' or 'warrior's day.' |
| Baelinans | Derived from the Old English 'bælin,' meaning 'warrior' or 'fighter.' |
| Baelli | Possibly derived from the Old English 'bæll,' meaning 'warrior' or 'fighter.' |
| Baerbald | From the Old English 'bærbald,' meaning 'battle bald' or 'warrior's bald head.' |
| Baerla | Derived from the Old English 'bærla,' meaning 'battle' or 'warrior.' |
| Baerwald | From the Old English 'bærwald,' meaning 'battle guardian' or 'warrior's protector.' |
| Baessel | Possibly derived from the Old English 'bæssel,' meaning 'battle' or 'warrior.' |
| Baetti | From the Old English 'bætti,' meaning 'battle' or 'warrior.' |
| Bailea | Berry Wood; Bailiff |
| Bailye | Berry Wood; Bailiff |
| Bakker | A name meaning one who bakes bread. |
| Baldewin | Brave or Bold Friend |
| Baldewyn | Derived from Old English, meaning 'brave friend' |
| Baldewyne | Derived from Old English, meaning 'brave friend' |
| Baldred | Derived from Old English, meaning 'brave ruler' |
| Baldthryth | Derived from Old English, meaning 'brave strength' |
| Baldwine | Brave or Bold Friend |
| Baldwulf | Derived from Old English, meaning 'brave wolf' |
| Balther | Derived from Old English, meaning 'brave warrior' |
| Baly | Derived from Old English, meaning 'brave' or 'strong' |
| Balye | Derived from Old French, possibly meaning 'noble' or 'exalted' |
| Trott | Possibly derived from Old English, meaning 'famous' or 'renowned' |
| Vagor | One who wanders the earth. |