Nielsen Hayden genealogy
Family: Llywelyn Fawr ap Iorwerth / (One of the several mistresses of Llywelyn ap Iorwerth) (F1936)
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Father | Male
Llywelyn Fawr ap Iorwerth
Born Abt 1173 Died 11 Apr 1240 Aberconwy Abbey, Conwy, Wales 
Buried Aberconwy Abbey, Conwy, Wales Married Other Spouse Tangwystl | F2104 Married Other Spouse Joan of England | F2856 Married Bef 23 Mar 1205 Other Spouse Eve Fitzwarine | F8310 Married 1239 Father Iorwerth Drwyndwn ap Owain Gwynedd | F993 Group Sheet Mother Margred ferch Madog | F993 Group Sheet
Mother | Female
(One of the several mistresses of Llywelyn ap Iorwerth)
Born Died Buried Father Mother
Child 1 | Female
+ Margaret ferch Llewelyn
Born Died 1265 Buried Spouse John de Brewes | F2145 Married 1219 Spouse Walter IV de Clifford | F3791 Married Bef 2 Nov 1234
Child 3 | Male
+ Tegwared y Baiswen ap Llywelyn ab Iorwerth Drwyndwn ab Owain Gwybnedd
Born Abt 1200 Died Buried Spouse Gwenllian ferch Ednyfed Fychan | F17584 Married