| Generation 1 - Sir Maurice FitzGerald, II, 3rd Lord Offally: Born - 1238 - Wexford, Ireland |
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| Generation 1 - Sir Maurice FitzGerald, II, 3rd Lord Offally: Died - Bef 10 Nov 1286 - Ross, County Wexford, Ireland |
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| Generation 1 - Sir Maurice FitzGerald, II, 3rd Lord Offally & Emmeline Longespee: Married - 1276 - Dublin, Leinster, Ireland |
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| Generation 2 - Sir Maurice FitzGerald, 2nd Lord of Offaly: Born - 1190-1194 - Ireland |
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| Generation 2 - Juliana de Grenville: Born - ~1200 - Offaly, Ireland |
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| Generation 2 - Juliana de Grenville: Died - 1257 - Offaly, Ireland |
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| Generation 3 - Sir Gerald FitzMaurice, 1st Lord of Offaly: Born - ~ 1150 - Wales |
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| Generation 4 - Sir Maurice FitzGerald, Lord of Maynooth, Naas, and Llanstephan: Born - ~ 1105 - (Wales) |
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| Generation 5 - Gerald FitzWalter: Born - ~ 1075 - Windsor Castle, Windsor, Berkshire, England |
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| Generation 5 - Gerald FitzWalter: Died - 0___ 1116 - (Wales) |
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| Generation 5 - Nest ferch Tewdwr, Princess of Deheubarth: Born - ~ 1085 - Dinefwr Castle, Dynevor, Llandyfeisant, Carmarthenshire, Wales |
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| Generation 6 - Rhys ap Tewdwr, King of Deheubarth: Born - ~1045 - Dynevor, Llandyfeisant, Carmarthenshire, Wales |
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| Generation 6 - Rhys ap Tewdwr, King of Deheubarth: Died - 30 Apr 1093 - Powys, Brecon, Wales |
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| Generation 6 - Rhys ap Tewdwr, King of Deheubarth & Gwladys ferch Rhwallon ap Cynfyn: Married - - (Powys, Wales) |
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| Generation 6 - Gwladys ferch Rhwallon ap Cynfyn: Born - 0___ 1041 - Powys, Wales |
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| Generation 7 - Tudor Mawr Cadwell, Prince of South Wales: Born - 995 - Dynevor, Llandyfeisant, Carmarthenshire, Wales |
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| Generation 7 - Tudor Mawr Cadwell, Prince of South Wales: Died - 1056 - Brittany, France |
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| Generation 7 - Tudor Mawr Cadwell, Prince of South Wales & Gwenllian Verch Gwyn: Married - 1040 - Wales |
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| Generation 7 - Gwenllian Verch Gwyn: Born - 1000 - Wales |
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| Generation 7 - Rhiwallon Ap Cynfyn: Born - 1020 - (Wales) |
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| Generation 7 - unnamed spouse: Born - - (Wales) |
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| Generation 8 - Caldwell ap Einion: Born - ~0970 - Dinefwr Castle, Dynevor, Llandyfeisant, Carmarthenshire, Wales |
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| Generation 8 - Caldwell ap Einion: Died - 1018 - Llangwm, Wales |
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| Generation 8 - Elinor Gwerystan: Born - ~0980 - Powys, Wales |
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| Generation 9 - Einion ap Owain: Born - 933 - Dinefwr Castle, Dynevor, Llandyfeisant, Carmarthenshire, Wales |
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| Generation 9 - Einion ap Owain & Nest Owain: Married - - (Wales) |
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| Generation 9 - Nest Owain: Born - ~0934 - Devon, England |
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| Generation 10 - Owain ap Hywel, Prince of South Wales: Born - ~ 905 - Wales |
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| Generation 10 - Angharad Verch Llywelyn: Born - ~ 910 - Wales |
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