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Male William I de Ros Click to view William I de Ros in the family tree

William I was born in Helmsley, Yorkshire, England.  William I's father was Robert II Surety Furfan de Ros and his mother was Isabella of Scotland.  His paternal grandparents were Everard de Ros and Roysia Trusbut; his maternal grandparents were William I the Lion of Scotland and Isabel Avenal. He had two brothers named Alexander and Robert III.


William I's family with Lucia FitzPiers of Brecknock

They had two sons and a daughter, named Robert IV, William II and Alice.

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