| Name | Meaning | Gender | Origin |
| Ungus | One vigor. | M | Irish |
| Uni | A Dane. | M | Norse |
| Unique | Only one. | F | Latin |
| Unity | Oneness | F | American |
| Unn | Love. | F | Norse |
| Unne | Love. | F | Norse |
| Unni | Poor/ afflicted/ that answers. | F | Biblical |
| Unwin | Unfriendly. | M | English |
| Unwine | Unfriendly. | M | English |
| Unwyn | Unfriendly. | M | English |
| Uny | Together. | F | Irish |
| Upala | Opal. | F | Indian |
| Upchurch | From the upper church. | M | English |
| Upendo | Love | M | African |
| Upharsin | Divided. | E | Biblical |
| Uphaz | Pure gold/ gold of Phasis or Pison. | E | Biblical |
| Upton | High village | M | Egyptian |
| Uptun | From the upper farm. | M | English |
| Upwode | From the upper forest. | M | English |
| Upwood | From the upper forest. | M | English |
| Uqbah | The end of everything. | M | Muslim |
| Ur | Fire/ light/ a valley. | M | Biblical |
| Ur Atum | Great. | M | Egyptian |
| Ura | The Heart | F | Hindi |
| Urania | Heavenly | F | Greek |
| Uranus | Sky. | M | Greek |
| Urbain | Form of URBAN | E | French |
| Urban | From the City | E | Latin |
| Urbana | Of the City | F | Latin |
| Urbane | Courteous. | F | Biblical |
| Urbania | Born of the city. | F | Latin |
| Urbano | From the City | M | Spanish |
| Urbi | Princess. | F | Egyptian |
| Uri | My Light | E | Hebrew |
| Uriah | God is my Light | M | Hebrew |
| Urian | From Heaven | M | Greek |
| Urice | Light. | F | Hebrew |
| Uriel | Angel of Light | M | Hebrew |
| Urien | Name of a king. | M | Arthurian Legend |
| Uriens | Name of a king. | M | Arthurian Legend |
| Urijah | The Lord is my light or fire | M | Biblical |
| Urim | Lights/ fires. | E | Biblical |
| Urit | Light | F | Hebrew |
| Urquhart | From the fount on the knoll. | M | Scottish |
| Ursa | Bear | F | Scandinavian |
| Ursala | Little Bear | F | Greek |
| Urseline | Bear. | F | Latin |
| Ursola | Bear. | F | Latin |
| Ursula | Female Bear | F | Scandinavian |
| Ursule | Bear. | F | Latin |