| Celtic baby names begining from T |
| Tadhg |
 | Mythical a prince of Munster. |
| Taliesin |
| Bard. |
| Tanguy |
| Fighter. |
| Teaghue |
| Bard. |
| Teague |
| Bard. |
| Teithi |
| Mythical son of Gwynham. |
| Teyrnon |
| Regal. |
| Tiernan |
| Regal. |
| Tiernay |
| Regal. |
| Torrey |
 | Lives by the tower. |
| Tory |
| Lives by the tower. |
| Trahern |
| Strong as iron. |
| Tremaine |
| From the town encircled by stone. |
| Tremayne |
| From the town encircled by stone. |
| Trevor |
| Wise. |
| Tris |
| Diminutive of Tristan: Sad din. In a story from the Middle Ages, Tristan, nephew of King Mark of Cornwall, was in love with the princess Iseult of Ireland. |
| Tristan |
| Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. |
| Tristen |
| Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. |
| Tristian |
| Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. |
| Tristin |
| Tumult; outcry. From the Celtic name Tristan. In Arthurian legend Tristan was a Knight of the Round Table and tragic hero of the medieval tale Tristram and Isolde. |
| Tristram |
| Variant of Tristan: Sad din. In a story from the Middle Ages, Tristan, nephew of King Mark of Cornwall, was in love with the princess Iseult of Ireland. |
| Turi |
| Bear. |
| |
