*Iorwerth ap Llywarch
born about 1147 Menai, Anglesey, Wales

father:
*Llywarch ap Bran
born about 1107 Menai, Anglesey, Wales

mother:
*Rhael verch Gronwy
born about 1111 Tegeingl, Flintshire, Wales

siblings:
*Tangwystl verch Llywarch born about 1141 Menai, Anglesey, Wales
Einudd ap Llywarch born about 1145 Menai, Anglesey, Wales
*Cadwgon ap Llywarch born about 1151 Plas-coch, Llanddaniel-fab, Anglesey, Wales
Einion ap Llywarch born about 1153 Menai, Anglesey, Wales
Madog ap Llywarch born about 1149 Menai, Anglesey, Wales

spouse:
*Gwenllian verch Hywel
born Talgarth, Trefeglwys, Montgomeryshire, Wales

children:
*Maredudd ap Iorwerth
born Menai cmt, Anglesey, Wales

biographical and/or anecdotal:

notes or source:
LDS
research of S. E. Oman Salt Lake City