| Terresa | One who is a summer harvester. |
| Terressa | A variant of Theresa meaning harvester. |
| Terttu | Finnish name meaning 'small island' or 'islet', possibly derived from the word 'tertta', meaning 'small island' or 'islet'. |
| Tesalyn | A modern name meaning summer harvest. |
| Tesca | Italian surname derived from 'tesca,' meaning 'weaver' or 'textile worker,' likely originating from a profession. |
| Tesla | Nikola Tesla's surname is derived from the Slavic word 'tisel', meaning 'to smile' or 'to be cheerful'. |
| Tessaly | Tessaly is derived from Thessaly, a region in Greece, meaning 'honeyed' or 'flowing with honey'. |
| Tessara | Derived from the Greek word for four. |
| Teunis | Priceless; of inestimable worth |
| Theoda | A name meaning people of the tribe. |
| Theofania | A name meaning manifestation of God. |
| Theressa | A name meaning to reap or gather. |
| Thomass | A variant of Thomas meaning twin. |
| Thommas | A name meaning a twin brother. |
| Thorben | Derived from the god of thunder. |
| Tiaa | An aunt; daughter born to royalty |
| Ticha | Nobleman; an aristocrat |
| Tieesha | A name meaning a living woman. |
| Tierany | Meaning a descendant of a lord. |
| Tiia | A name meaning a godly person. |
| Tiina | Meaning a pure and holy person. |
| Timaeus | Timaeus is a Greek name meaning 'honorable' or 'esteemed', derived from timē, meaning 'honor'. |
| Timm | One who honors god |
| Tinna | Meaning a small, petite woman. |
| Tinny | A name meaning a tiny person. |
| Tirone | Meaning land of the yew tree. |
| Tirowne | A variant of the name Tyrone. |
| Tirtzah | Tirtzah is a Hebrew name meaning 'my delight' or 'my joy', derived from the word 'tzah' meaning joy. |
| Tishal | A name of unknown origin. |
| Tishala | Tishala is a Sanskrit name meaning 'one who is blessed with good fortune and prosperity'. |
| Tison | Son of a person named Tye. |
| Tiszon | A modern invented name. |
| Titty | A term of endearment or pet. |
| Tiziano | Derived from the Roman Titus. |
| Tocara | Beloved; friend |
| Tomah | A variant of the name Thomas. |
| Tomm | A short form of the name Tom. |
| Toms | A variant meaning twin. |
| Tonia Javae | Worthy of praise |
| Tonii | A form of Anthony, priceless. |