Gilbert de Lacy, b: 1198 - Dublin, Ireland


			^{Hugh de Lacy}^{b.1135 Ewyas Lacy, England d.1186 murdered}

		^{Walter de Lacy}^{b.1172 Ewias Lacy, England d.1240}	^{Rhodesia Fitz Baderon}^{b.1140 Monmouthshire, Wales d.}

	^{Gilbert de Lacy}^{b.1198 Dublin, Ireland d.1234}		^{William de Braose}^{b.1153 Brecknockshire, Wales d.1211}

		^{Margaret de Braose}^{b.1177 Abergevenny, Wales d.1200}	^{Maud de St Valery}^{b.1155 Haye d.1210}

^{Margaret de Lacy}^{b.1227 Dublin, Ireland d.1256}			^Roger Bigod^{b.1150 Norfolk, England d.1221 Thetford, England}

		^{Hugh Le Bigod}^{b.1185 Thetford, England d.1223 England}	^{Isabel de Warenne}^{b.1165 Warren, Sussex, England d.}

	^{Isabel Bigod}^{b.1208 Thetford, England d.1239}		^{William Marshall}^{b.1146 Pembroke, Wales d.1219 Caversham Man, England}

		^{Matilda (or Maud) Marshall}^{b.1192 Pembroke, Wales d.1248}	^{Isabel de Clare}^{b.1173 Pembroke, Wales d.1220 Pembroke, Wales}