About Susanna verch Gruffydd
Susanna verch Gruffydd b abt 1112, Aberffraw Castle, Anglesey, Wales, daughter of Gruffydd ap Cynan and Angharad verch Owain. She md Madog ap Maredudd abt 1130, prob Wales, son of Maredudd ap Bleddyn, Prince of Powys, and Hunydd verch Einudd.

Children of Madog ap Maredudd and Susanna verch Gruffydd were:

1) Gruffydd-Maelor ap Madog, Lord of Bromfield, b abt 1146.

2) Marared verch Madog b abt 1150, Aberffraw Castle, Anglesey, Wales. She md Iorwerth-Drwyndwn ap Owain abt 1168, son of Owain-Gwynedd ap Gruffydd and Gwladys verch Llywarch.

or, according http://en.wikipedia.org/wiki/Madog_ap_Maredudd#Children :

1. Llywelyn ap Madog

2. Gruffydd Maelor

3. Owain Brogyntyn

4. Gwenllian ferch Madog, married Rhys ap Gruffydd, prince of Deheubarth

5. Marared ferch Madog, married Iorwerth Drwyndwn and was the mother of Llywelyn the Great

6. Efa ferch Madog, married Cadwallon ap Madog

Courtesy of fantastically full family tree cf.:
Hughes of Gwerclas 1/2/3/4:

http://www.maximiliangenealogy.co.uk/burke1/Royal%...ghesofgwerclas_1.htm

http://www.maximiliangenealogy.co.uk/burke1/Royal%...ghesofgwerclas_2.htm

http://www.maximiliangenealogy.co.uk/burke1/Royal%...ghesofgwerclas_3.htm

http://www.maximiliangenealogy.co.uk/burke1/Royal%...ghesofgwerclas_4.htm

12694-Welsh Medieval Database
Susanna was the 2nd wife of Madog ab Maredudd, Brenin of Povys. Source- Griffith-Pedigrees of Anglesey and Caernarvan,Page 331

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