Prince of Wales Llywelyn ap Iorweth (The Great)
Llywelyn ap Iorweth, known as The Great, was born in 1173 in Aberffraw Castle,Angelsey,Caernarvonshire,Wales.  He died  due to stroke at the age of 67 on April 11th, 1240 in Aberconwy,Arllechwedd Isaf,Caernarvonshire,Wales.  He was buried in Aberconwy Abbey,Wales.

 Tangwysl Goch (verch Rhos?)
Tangwysl Goch (verch Rhos?) was born about 1155 in Rhos,Denbighshire,Wales.

 Prince of Wales Gruffydd ap Llywelyn
Gruffydd ap Llywelyn was born about 1170.

 Gwladys Ddu verch Llywelyn
Gwladys Ddu verch Llywelyn was born about 1194 in Gwynedd,Caernarvonshire,Wales.  She died in 1251.

 Helen verch Llywelyn
Helen verch Llywelyn was born about 1200.

 Margred verch Llywelyn
Margred verch Llywelyn was born about 1202 in Caernarvonshire,Wales.  She died in Clifford Castle,Herefordshire,England.  She was buried in Priory Church,Aconbury,Herfordshire,England.