Name
- Sion ab Meredydd ab Hywel1
- Sion ab Rhisiart Piers1
- Sion ab Rhobert ab Rhys ab Hywel1
- Sovereigns of England1
- Syfryn Cyveiliog, alias Dafydd Bach ab Madog Wladaidd1
- Theodere, Richard Owen1
- Thomas Anwyl1
- Thomas Derllys1
- Thomas Llwyd Jevaf1
- Thomas ab Robert1
- Thomas, Humphrey1
- Thomas, Morys1
- Thomas, Richard, of Add MS 148841
- Thomas, Robert, of St. Bride's1
- Trevor, John, of Add MS 148911
- Twm Tegid1
- Vaughan, Family1
- Vaughan, Rowland1
- Watcin Clywedog1
- William Matthew1