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Male William I de Lancaster , 5th Baron of Kendal Click to view William I de Lancaster , 5th Baron of Kendal in the family tree

William I de was born about 1108 in Workington, Coupland, England.  William I de's father was Gilbert de Lancaster , 4th Baron of Kendal and his mother was Unknown First Wife. He had a half-brother named Nicholas FitzGilbert de.  He died in 1170 in Kendal, Westmorland, England.  He was buried in Governor of Castle of Lancaster.

William I de's first family with Gundred de Warenne

‌William I de and Gundred de were married in a religious ceremony after 1153 in 2nd husband.  They had a son and a daughter, named William II de and Avice de.

William I de's second family with Unknown 1st Wife or Mistress

They had a son named Gilbert de.

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