Llywarch ap Trahaearn
Llywarch ap was born about 1070 in Arwystli, Montgomeryshire, Wales.  He died in 1128 in North Wales.¹ 

 Dyddgu verch Iorwerth
Dyddgu verch was born about 1060 in Radnorshire, Wales.¹ 

 Gwladus verch Llywarch
Gwladus verch was born about 1098 in Arwystli, Montgomeryshire, Wales.

 Robert ap Llywarch
Robert ap was born about 1100 in Arwystli, Montgomeryshire, Wales.  He died in 1171.

 Elen verch Llywarch
Elen verch was born about 1102 in Arwystli, Montgomeryshire, Wales.

 Iorwerth ap Llywarch
Iorwerth ap was born about 1104 in Arwystli, Montgomeryshire, Wales.  He died in 1130.

 Maredudd ap Llywarch
Maredudd ap was born about 1106 in Arwystli, Montgomeryshire, Wales.  He died in 1129.

 Madog ap Llywarch
Madog ap was born about 1108 in Arwystli, Montgomeryshire, Wales.  He died in 1130.