_Gilbert DE CLARE ___+ | _Richard DE CLARE ___| | | | |_Isabel MARSHAL _____ | _Thomas DE CLARE _____| | | | | _John DE LACY _______+ | | | (1192 - 1240) | |_Maud DE LACY _______| | (1188 - 1207) | | |_Margaret DE QUINCY _+ | (1208 - 1266) | |--Margaret DE CLARE | | _____________________ | | | _____________________| | | | | | |_____________________ | | |_Juliana FITZMAURICE _| | | _____________________ | | |_____________________| | |_____________________