King Cadfan ap Iago of Gwynedd
Cadfan was born about 0569 in Wales.  He died in 0617.

 Tandreg ("Ddu") verch Cynan
Tandreg, known as "Ddu", was born about 0569 in Powys, Wales.

 King Cadwallon ap Cadfan of Gwynedd
Cadwallon was born about 0591 in Wales.  He died  due to killed in battle.