William De Mauduit
William was born in 1130 in Hanslope, Buckinghamshire, England.  He died at the age of 69 in 1199.

 Isabel De Saint Liz
Isabel De was born about 1138 in Huntingdon, Huntingdonshire, England.

 Robert De Mauduit
Robert was born about 1154 in Hanslope, Buckinghamshire, England.  He died in June 1221.