William De Lancaster
William was born about 1189 in Kendal, Westmorland, England.  He died on November 20th, 1246.

 Agnes De Brus
Agnes was born about 1192 in Skelton Castle, Yorkshire, England.

 Avice De Lancaster
Avice was born in 1211 in Barton, West Ward, Westomorland, England.  She died in Lamberton, Berwickshire, Scotland.