| Thaen | Follower; Attendant Warrior |
| Thaker | A name meaning a carpenter or mason. |
| Thames | Derived from Old English, meaning 'son of Thames' or 'from the Thames River' |
| Thanchere | Derived from Old French, meaning 'from the marsh' or 'from the swamp' |
| Thay | A name meaning a gift from the gods. |
| Theabul | Derived from Old English, meaning 'from the boar' or 'from the wild boar' |
| Thebaldus | Derived from Old English, meaning 'from the bold' or 'from the brave' |
| Theobaldus | Derived from Old English, meaning 'bright and bold' or 'famous and brave' |
| Theodbald | Derived from Old English, meaning 'bright and bold' or 'famous and brave' |
| Theodbeald | Derived from Old English, meaning 'bright and bold' or 'famous and brave' |
| Theodbeorht | Derived from Old English, meaning 'bright and famous' or 'famous and renowned' |
| Theoderich | Ruler of the People |
| Theodgar | Derived from Old English, meaning 'people's spear' or 'warrior of the people' |
| Theodlac | Derived from Old English, meaning 'people's glory' or 'glory of the people' |
| Theodulf | Derived from Old English, meaning 'people's wolf' or 'wolf of the people' |
| Thingfrith | Derived from Old English, meaning 'peace of the assembly' or 'assembly's peace' |
| Thoas | Derived from Greek, meaning 'bold' or 'courageous' |
| Thomaso | Derived from Aramaic, meaning 'twin' or 'double' |
| Thornas | Derived from Old English, meaning 'thorn island' or 'island of thorns' |
| Thorneley | Derived from Old English, meaning 'thorn clearing' or 'clearing of thorns' |
| Thornely | Derived from Old English, meaning 'thorn meadow' or 'meadow of thorns' |
| Thorweald | Derived from Old English, meaning 'thunder guardian' or 'protector of the thunder' |
| Thraesfrith | Derived from Old English, meaning 'peace of the people' or 'assembly's peace' |
| Throca | Possibly derived from 'throc', meaning 'thorn' or 'prickly'. |
| Thruidred | Possibly derived from 'thruid', meaning 'thrust' or 'force'. |
| Thrydwulf | Derived from 'thryd', meaning 'thrust' or 'force', and 'wulf', meaning 'wolf'. |
| Thrymma | Possibly derived from 'thrym', meaning 'thrust' or 'force'. |
| Thunor | Derived from 'thun', meaning 'thunder'. |
| Thurstance | Derived from 'thur', meaning 'thunder', and 'stance', meaning 'place'. |
| Thymel | Derived from 'thym', meaning 'thyme' or 'perfume'. |
| Thymli | Derived from 'thym', meaning 'thyme' or 'perfume'. |
| Tibbi | Derived from 'tib', meaning 'tib', a type of plant. |
| Tica | Derived from 'tika', meaning 'tika', a type of plant. |
| Ticcea | Derived from 'tika', meaning 'tika', a type of plant. |
| Tida | Derived from 'tida', meaning 'tide' or 'sea'. |
| Tidfrith | Derived from 'tid', meaning 'tide' or 'sea', and 'frith', meaning 'peace'. |
| Tidhe | Derived from 'tid', meaning 'tide' or 'sea'. |
| Tidhelm | Derived from 'tid', meaning 'tide' or 'sea', and 'helm', meaning 'helmet'. |
| Tidi | Derived from 'tid', meaning 'tide' or 'sea'. |
| Tidna | Derived from 'tid', meaning 'tide' or 'sea'. |