William I De Lancaster
William I was born about 1115 in Kendal, Westmorland, England.  He died in 1170.

 Gundred De Warenne
Gundred was born about 1123 in Surrey, England.  She died after 1166.

 Avice De Lancaster
Avice was born about 1134 in Kendal, Westmorland, England.