Isabel Bigod, b: 1212 - Thetford, England


			^{Hugh III de Lacy}^{b.1115 Ewias Lacy, England d.1186 Durrow, Ireland}

		^{Walter de Lacy}^{b.1160 Ewias Lacy, England d.1241}	^{Rohesia de Clare}^{b.1090 Clare, Suffolk, England d.1149, England}

	^{Gilbert de Lacy}^{b.1206 Dublin, Ireland d.}		^{William V de Braose}^{b.1153 Bramber, Sussex, England d.1211 Corbeil, Marne, France}

^{Maud de Lacy}^{b.1232 Dublin, Ireland d.1304}		^{Margaret de Braose}^{b.1177 Abergavenny, Wales d.1200}	^{Matilda (Maud) St Valerie}^{b.1155 Bramber, Sussex, England d.1210 Corfe, Windsor, England}

^{Margery de Lacy}^{b.1226 Ewyas Lacy, England d.}			^{Roger III Bigod}^{b.1148 Norfolk, England d.1221 Thetford, England}

		^{Hugh II Bigod}^{b.1175 Thetford, England d.1224}	^{Isabel Plantagenet}^{b.1154 Norfolk, England d.}

	^{Isabel Bigod}^{b.1212 Thetford, England d.1239}		^{William "The Pembroke}^{b.1146 Pembroke, Wales d.1219 Caversham Manor}

		^{Maud (Matilda) Marshall}^{b.1171 Pembroke, Wales d.1248}	^{Hawise de Clare}^{b.1169 Pembroke, Wales d.1217 Pembroke, Wales}