| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 861 | Tomas | Gaelic | Twin. | M | |
| 862 | Tormod | Gaelic | From the north. | M | |
| 863 | Torrance | Gaelic | From the knolls. | M | |
| 864 | Trina | Gaelic | Diminutive of Catriona, a Scottish Gaelic variant of Catherine meaning meaning pure, clear. | F | |
| 865 | Tuathal | Gaelic | Peaceful. | M | |
| 866 | Tulley | Gaelic | Peaceful. | M | |
| 867 | Tully | Gaelic | Peaceful. | M | |
| 868 | Tynan | Gaelic | Dark. | M | |
| 869 | Uilleam | Gaelic | Helmeted. | M | |
| 870 | Uisdean | Gaelic | Intelligent. | M | |
| 871 | Una | Gaelic | Gaelic forms of Agnes. | F | |