| 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'. |
| Tidsige | Derived from 'tid', meaning 'tide' or 'sea', and 'sige', meaning 'victory'. |
| Tidweald | Derived from 'tid', meaning 'tide' or 'sea', and 'weald', meaning 'forest'. |
| Tidwulf | Derived from 'tid', meaning 'tide' or 'sea', and 'wulf', meaning 'wolf'. |
| Tigerni | Tiger's descendant or son |
| Tilbert | Bright ruler or noble leader |
| Tiler | Tile maker or craftsman |
| Tilhere | Noble or lordly here |
| Tilmund | Mound or hill of the noble |
| Tima | Honoured by God; Honouring God |
| Timber | A name meaning wood for building homes. |
| Timkin | Honoured by God; Honouring God |
| Timothie | Honoured by God; Honouring God |
| Tincommius | Tin or copper treasure |