| Thwaite | Man | English Names |
| Thyme | Unisex | English Names |
| Tibby | Unisex | English Names |
| Tiffany | Woman | English Names |
| Tiger lily | Woman | English Names |
| Tilda | Woman | English Names |
| Tilden | Man | English Names |
| Tillie | Woman | English Names |
| Tilly | Woman | English Names |
| Timmy | Man | English Names |
| Tina | Woman | English Names |
| Titan | Unisex | English Names |
| Tobin | Man | English Names |
| Toby | Unisex | English Names |
| Todd | Man | English Names |
| Toddy | Man | English Names |
| Tolliver | Unisex | English Names |
| Tommy | Man | English Names |
| Toni | Woman | English Names |
| Tony | Man | English Names |