 Father | MaleLlewelyn "Fawr" IOWERTH, Prince Of Wales |
| Born | Abt 1173 | , Anglesey, Wales  |
| Died | 11 Apr 1240 | Aberconway, Carnarvon, , WLS |
| Buried | Aberconway, Carnarvon, , WLS |
|
| Married | 1204 | |
| Other Spouse | Tangwystl Goch FERCH LLYWARCH | F6376 | |
| Married | ||
| Father | Iowerth "Drwyndwn" AP OWAIN GWYNEDD | F897 Group Sheet | |
| Mother | Margaret Vz Madog Ap Maredudd Ap Bleddyn AP CYNFYN | F897 Group Sheet | |
 Mother | FemaleJoan (Joanna) OF ENGLAND |
| Born | 1191 | |
| Died | 2 Feb 1237 | Llyn Eglwystl, , , WLS |
| Buried | Feb 1237 | Llanfaes, , , WLS |
| Father | John LACKLAND, King Of England | F6368 Group Sheet | |
| Mother | Clementina | F6368 Group Sheet | |
| Child 1 | Female Angharad FERCH LLEWELYN |
| Born | Aft 1204 | |
| Died | Yes, date unknown | |
| Buried | ||
| Spouse | Maelgwn "Fychan" MAELGWN | F6476 | |
| Married | ||
| Child 2 | Female Elen Or Helen FERCH LLEWELLYN, Princess Of N.Wales |
| Born | 1207 | |
| Died | Yes, date unknown | |
| Buried | ||
| Spouse | John, Earl Of Chester THE SCOT | F5138 | |
| Married | Abt 1221 | |
| Child 4 | Female Gwladys "Ddu" FERCH LLEWELYN |
| Born | ||
| Died | 1240 | |
| Buried | ||
| Spouse | Reginald DE BREOSE | F6290 | |
| Married | 1215 | |
| Spouse | Ralph MORTIMER | F6298 | |
| Married | Aft 1228 | |
