Cadwallon ap Gruffydd Prince of Gwynedd (1090–1132) Parents Gruffudd ap Cynan Angharad ferch Owain Children Siblings Gwenllian ferch Gruffydd Gwenllian ferch Gruffudd ap Cynan Merinedd ferch Gruffudd ap Cynan Rhanullt ferch Gruffudd ap Cynan Margred ferch Gruffudd ap Cynan Susanna ferch Gruffudd Cadwaladr ap Gruffudd Owain Gwynedd Yslani ferch Gruffudd ap Cynan, aka Elen or Alswn