Trahaearn Ap Madog
Trahaearn was born in 1250 in Llyn, Caernarvonshire, Wales.  He died at the age of 23 in 1273 in Tower London, London, Middlesex, England.

 Ieuan Ap Trahaearn
Ieuan was born in 1272 in Baelibrith, Dyffryn Honddu, Breconshire, Wales.