William ROS 
He had a biological son named Thomas of Kendal.
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Personal Details
William ROS
William was born about 1270 in Wark Castle, Wark-on-Tweed, Northumberland, England. He died before May 9th, 1310 in Kendal Castle, Westmoreland, England.
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Children
Thomas of Kendal ROS
Thomas of Kendal was born about 1307 in Kendal, Westmoreland, England. Thomas of Kendal is no longer alive.