Llywarch ap Trahearn
Llywarch was born in 1070 in Arwystli,Montgomeryshire,Wales.  He died at the age of 58 in 1128.

 Dyddgu ferch Iorwerth 

 Gwladus ferch Llywarch
Gwladus ferch was born in 1098.

 Robert ap Llywarch 
Robert was born in 1100 in Arwystli,Montgomeryshire,Wales.  He died at the age of 71 in 1171.