See also
| Husband: | Llwelyn ap Iorwerth of GWYNEDD (c. 1173-1240) | |
| Wife: | Joan PLANTAGENET ( - ) | |
| Children: | Helen verch Llewelyn of GWYNEDD (c. 1207-1253) | |
| Daffyd ap Llewelyn of GWYNEDD (1215-1246) | ||
| Elen 'the Younger' ferch Llewelyn of GWYNEDD (bef1230-1295) | ||
| Marriage | 1205 | |
| Name: | Llwelyn ap Iorwerth of GWYNEDD | |
| Sex: | Male | |
| Father: | Iowerth Drwyndwn Ap Owain of GWYNEDD (c. 1145-1174) | |
| Mother: | Marared Ferch Madog of POWYS (c. 1150-1198) | |
| Birth | c. 1173 | Aberffraw Castle, Aberconway, Wales |
| Occupation | Prince of Gwynedd | |
| Death | 12 Apr 1240 (age 66-67) | Arllechwedd Isaf, Caernarvonshire, Wales |
| Name: | Joan PLANTAGENET | |
| Sex: | Female | |
| Father: | John 'Lackland' PLANTAGENET (1166-1216) | |
| Mother: | Clemence de BOITELIER ( - ) | |
| Occupation | Princess of Wales | |
| Name: | Helen verch Llewelyn of GWYNEDD | |
| Sex: | Female | |
| Spouse 1: | Robert de QUINCY ( - ) | |
| Spouse 2: | John of HUNTINGTON ( - ) | |
| Birth | c. 1207 | |
| Death | 1253 (age 45-46) | |
| Name: | Daffyd ap Llewelyn of GWYNEDD | |
| Sex: | Male | |
| Spouse: | Isabella de BRAOSE (c. 1222-1248) | |
| Birth | 1215 | |
| Death | 1246 (age 30-31) | |
| Name: | Elen 'the Younger' ferch Llewelyn of GWYNEDD | |
| Sex: | Female | |
| Spouse 1: | Donald I MACGYLOCHER (c. 1240-1297) | |
| Spouse 2: | Malcolm MACDUFF (c. 1205-1266) | |
| Birth | bef 1230 | |
| Death | 16 Feb 1295 (age 64-65) | |
9 children.
Daughter's mother is not his wife. His line goes back to 100AD. Llewelyn had six other children with two other wives.
Illegitimate daughter of King John of England.