Jonathan FitzWilliam of Ashington
Jonathan was born in 1132 in Ashington, Somerset, England.

 Elizabeth FitzWilliam
Elizabeth was born in 1152 in Ashington, Somerset, England.  She died at the age of 57 in 1209.

 Robert FitzWilliam
Robert was born in 1152 in Ashington, Somerset, England.  He died at the age of 33 in 1185 in Ashington, Somerset, England.