| Tudwrig | Derived from Old English, possibly meaning 'famous' or 'renowned' |
| Tumma | Derived from Old English, possibly meaning 'famous' or 'renowned' |
| Turnar | One who works with the earth. |
| Turoc | Derived from Old English, possibly meaning 'famous' or 'renowned' |
| Tushal | Eyes; Association; Desire |
| Tennis | One who serves with great skill. |
| Teodulo | A servant of the divine God. |
| Tefanus | A variant of the name Stephen. |
| Teiko | Hitting the Mark |
| Teini | A young person in adolescence. |
| Teko | One of Action and Deeds |
| Tenho | Fascination; Enchantment |
| Tenne | Basket of Fruit |
| Tenni | A short form of the name Tenho. |
| Tennu | A Finnish name meaning a small child. |
| Teofilus | Greek name meaning friend of God. |
| Teovil | A name meaning a lover of the divine. |
| Tepi | A Finnish name meaning a small spark. |
| Teppa | A name meaning a gift from the Lord. |
| Teppana | A name meaning a crown or garland. |
| Tepu | A name meaning a source of wisdom. |
| Terava | One who is Keen |
| Terho | A Finnish name meaning an acorn. |
| Terkki | Watch or observation |
| Tero | Man; Warrior; Plant; Earth |
| Teroi | A name meaning a strong warrior. |
| Tertullian | A name meaning the third born. |
| Tertullianus | Derived from the Latin word for third. |
| Teutori | A Finnish name meaning a creator. |
| Teuvo | A Finnish form of the name Theodore. |
| Tukea | Support; Hold up |
| Tuokko | A Finnish surname meaning a wooden vessel. |
| Tuoma | A Finnish form of the name Thomas. |
| Tuomo | A Finnish variant of the name Thomas. |
| Tuovetti | A rare Finnish diminutive of Tuovi. |
| Turkka | Finnish for 'turkey' |
| Turo | A Finnish name meaning Thors warrior. |
| Tuukka | A Finnish form of the name Thorgils. |
| Tuuni | Twin; Priceless; Inestimable |
| Tuure | A Finnish form of the name Tore. |