Ein Awduron
t
- Pegi Talfryn
- Rhiannon Taylor
- Leri Tecwyn
- Ryland Teifi
- Testun,
- Christina Thatcher
- Simon Thirsk
- Delme Thomas
- Dr Wyn Thomas
- Edward Thomas
- Gareth Thomas
- Geraint Thomas
- Gwyn Thomas
- Jamie Thomas
- Kiri Thomas
- M Wynn Thomas
- Mark Thomas
- Owen John Thomas
- Rebecca Thomas
- Rhiannon Thomas
- Simon Thomas
- Becky Thorns
- Greta Thunberg
- Vicky Tibbott
- Llŷr Titus
- Roy Tomkinson
- Angharad Tomos
- Elin Tomos
- Glyn Tomos
- Heiddwen Tomos
- Morgan Tomos
- Janet Treasure
- Mari Tudor
- Marged Tudur
- Non Tudur
- Iestyn Tyne
