Ein Awduron
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- L Talairach-Vielmas
- Pegi Talfryn
- Sarah Tanburn
- Leri Tecwyn
- Ryland Teifi
- Ece Temelkuran
- Testun,
- Simon Thirsk
- David N Thomas
- Delme Thomas
- Dr Wyn Thomas
- Dylan Thomas
- Edward Thomas
- Gareth Thomas
- Geraint Thomas
- Gwyn Thomas
- Jamie Thomas
- Kiri Thomas
- M Wynn Thomas
- Mark Thomas
- Owen John Thomas
- Penny Thomas
- Rhiannon Thomas
- Andrew Thompson
- Becky Thorns
- Greta Thunberg
- Vicky Tibbott
- Roger Tiley
- Stephanie Tillotson
- Roy Tomkinson
- Angharad Tomos
- Elin Tomos
- Glyn Tomos
- Heiddwen Tomos
- Morgan Tomos
- Jeff Towns
- Joseph Tramontana
- Janet Treasure
- Sharon Tregenza
- Rachel Trezise
- Mari Tudor
- Marged Tudur
- Non Tudur
- Jonathan Tulloch
- Robert Tyler
- Iestyn Tyne
- Dan Tyte
