Name
- Roberts, John, of Ty-du1
- Siancyn ab Einion1
- Siarlas ab Jorwerth Jon Bodfary1
- Sion Davydd, o Nannau1
- Sion Edward1
- Sion ab Hywel1
- Sion ab William Gruffydd1
- Sovereigns of England1
- Thomas Grythor1
- Thomas Wynn ab Edmwnt ab Rhys ab Rhobert ab Jevan Fychan1
- Thomas Wynn ab Rhys1
- Thomas, David, alias Davydd Ddu Eryri1
- Thomas, John, of Add MS 148781
- Thomas, Richard, of Add MS 148841
- Trevor, John, of Add MS 148911
- Vaughan, John, of Add MS 148881
- Vaughan, Rowland1
- William Cynwal, of Add MS 149351
- William Penllyn1
- William ab Rhys ab Davydd1