Seisyll de Gwynedd

• 
• Born in 938

Parents

• Ednywain ap Pyll de Gwynedd (913 - )
• Elise verch Anarawd de Gwynedd (916 - 940)

Family

• Married with Elsylt verch cynan de Gwynedd, issuing
  • Llywelyn (989 - 1023)