See also
| Husband: | Iowerth Drwyndwn Ap Owain of GWYNEDD (c. 1145-1174) | |
| Wife: | Marared Ferch Madog of POWYS (c. 1150-1198) | |
| Children: | Llwelyn ap Iorwerth of GWYNEDD (c. 1173-1240) | |
| Name: | Iowerth Drwyndwn Ap Owain of GWYNEDD | |
| Sex: | Male | |
| Father: | Owain ap Gruffydd of GWYNEDD (c. 1100-1170) | |
| Mother: | Gwladus Ferch Llwwarch Ap TRAHAEARN ( - ) | |
| Birth | c. 1145 | |
| Death | 1174 (age 28-29) | |
| Name: | Marared Ferch Madog of POWYS | |
| Sex: | Female | |
| Father: | Madog ap Maredudd of POWYS (c. 1090-1160) | |
| Mother: | Susanna verch Gruffydd of GWYNEDD ( - ) | |
| Birth | c. 1150 | Overton-Madog, Montgomeryshire, Wales |
| Death | 1198 (age 47-48) | |
| Name: | Llwelyn ap Iorwerth of GWYNEDD | |
| Sex: | Male | |
| Spouse 1: | Joan PLANTAGENET ( - ) | |
| Spouse 2: | Tangwystl verch Llywarch ( - ) | |
| Birth | c. 1173 | Aberffraw Castle, Aberconway, Wales |
| Occupation | Prince of Gwynedd | |
| Death | 12 Apr 1240 (age 66-67) | Arllechwedd Isaf, Caernarvonshire, Wales |