World of HYDE
Discovering our Ancestors and their descendants to all parts of the world. Last updated 15th March 2026.
Family: King of Gwynedd and Prince of Wales under King John I and King Henry III of England King Llewelyn Ap Iorwerth, Of Wales / Princess Joan Lackland Plantagenet (F9666)
m. 23 Mar 1204
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Male
King of Gwynedd and Prince of Wales under King John I and King Henry III of England King Llewelyn Ap Iorwerth, Of Wales
Birth 1173 Dowyddelan, Gwynedd, Caernarvonshire, Cymru Wales 
Christening 11 Nov 1173 Death 11 Apr 1240 Conwy, Caernarfonshire, Wales Burial Apr 1240 Conwy, Caernarfonshire, Wales Marriage 23 Mar 1204 Other Spouse Tangwystl Goch | F61236 Marriage Father Iorwerth ab Owain | F6820 Group Sheet Mother Marared Verch Madog | F6820 Group Sheet
Female
Princess Joan Lackland Plantagenet
Birth 22 Jul 1188 Coucy, Ardennes, Champagne-Ardenne, France Christening 1265 Windsor Castle, Berkshire, England Death 2 Feb 1237 Aber, Caernarfonshire, Wales Burial Feb 1237 Saint Mary's At Beaumaris, Beaumaris, Isle of Anglesey, Wales Father King John Plantagenet, 1 Of England | F9727 Group Sheet Mother Clemence | F9727 Group Sheet
Female
Gwladus Ferch Llywellyn
Birth 1206 Gwynedd, Caernarvonshire, Wales Death 24 Oct 1251 Windsor, Berkshire, England Burial 1251 Windsor, Berkshire, England Spouse Ralph De Mortimer, Lord Of Wigmore | F9630 Marriage 1230 Cwmaron Castle, Radnorshire, Wales Spouse Reginald De Braose | F48936 Marriage
Female
Princess of Gwynedd, Princess of Wales, Countess of Huntingdon and Chester, Elen Ferch Llywelyn
Birth 1207 Abergwyngregyn, Gwynedd, Wales Death 1253 Gwynedd, Wales Burial Spouse John De Huntingdon, 9th Earl Of Huntingdon And 7th Earl Of Chester | F61237 Marriage 1222 Spouse Robert De Quincy, The Younger | F61238 Marriage
Female
Margred Verch Llywelyn Of Caernarfonshire
Birth Abt 1208 Caernarfonshire, Wales Christening 1208 Gloucestershire, England, United Kingdom Death 28 Oct 1267 Clifford Castle, Herefordshire, England, United Kingdom Burial Aft 28 Oct 1267 Aconbury, Herefordshire, England Spouse Walter De Clifford, III Cortham | F10501 Marriage Spouse Sir John De Braose, Lord Of Bramber Gower | F40543 Marriage 1219 Wales
Male
Daffyd Ap Llewelyn, Prince Of Gwynedd
Birth Mar 1212 Bagillt, Flintshire, Wales Death 25 Feb 1246 Aber Garth Celyn, Gwynedd, Wales Burial 1246 Conwy, Wales Spouse Isabella De Braose | F15792 Marriage Abt 1231 Caernarfonshire, Wales
Female
Elen Ferch Llywelyn
Birth 1230 Cantref, Breconshire, Wales Death 16 Feb 1295 Shere, Surrey, England Burial 1295 Holme Abbey, Holme Cultram, Cumberland, England Spouse 6th Earl of Mar Domhnall Mac Uillem, 6th Earl Of Mar | F6803 Marriage Aft 1266