| Tyrrin | Sovereign; king |
| Tyry | A name meaning a small, energetic soul. |
| Tytiana | A name meaning a princess of the earth. |
| Tzeitel | A Yiddish name meaning little princess. |
| Tzila | Tzila is a Hebrew name meaning 'my ornament' or 'my treasure', symbolizing beauty and value. |
| Tzipora | Tzipora is a Hebrew name meaning 'bird' or 'songbird', symbolizing beauty and freedom. |
| Tziporah | Bird, or songbird, a Hebrew name symbolizing freedom and joy. |
| Tzipporah | Bird, or songbird, a name given to the wife of Moses in the Hebrew Bible. |
| Tzivya | A Hebrew name meaning a deer. |
| Tzofia | A name meaning one who watches. |
| Tzuria | Tzuria is a Hebrew name meaning 'my rock' or 'my fortress', symbolizing strength and protection. |
| U | A name meaning the universe. |
| Uan | A name meaning a gentle lamb. |
| Ubaldo | Ubaldo is a masculine given name of Italian origin, meaning 'ruler of the people'. |
| Uchenna | Uchenna means 'God's gift' or 'gift from God' in the Igbo language of Nigeria. |
| Udgiti | A sacred or holy chanting. |
| Udiya | One who is rising or ascending. |
| Uehudah | Name honoring john the baptist |
| Ugne | Strength, power, or a strong and powerful person |
| Uhura | One who is skilled in the art of war, warrior |
| Uinseann | Derived from the name Vincent. |
| Uisne | One who is skilled in the art of war, warrior |
| Ulalume | Beautiful, lovely, or a beautiful place |
| Uli Ulrik | Master of possessions |
| Ulisse | Mythology by the hero of the Odyssey |
| Ulisses | Mythology by the hero of the Odyssey |
| Ulli | A name meaning noble and strong. |
| Uloriaq | One who is skilled in the art of war, warrior |
| Ulvhild | Beautiful battle, or a strong and powerful woman |
| Ulyssa | A variant of the name Odysseus |
| Ulyssia | Derived from the name of Odysseus |
| Umayo | A name meaning mother of the night |
| Umbelina | Beautiful, lovely, or a beautiful place |
| Umbria | Region in Italy, or a place of beauty |
| Umut | Strength, power, or a strong and powerful person |
| Un Nefer | God of the dead |
| Undie | One who is skilled in the art of war, warrior |
| Uniqia | A unique and singular person |
| Uniquia | A unique and singular person |
| Unus | One who is friendly and kind |