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

Sir William  I was born in 1196.  Sir William  I's father was Robert  II de Ros and his mother was Isabella of Scotland.  His maternal grandparents were King William  I (The Lion) of Scotland and Isabel Avenal. He had a brother named Robert  III. He had a half-brother named Ralph  II.  He died at the age of 68 in 1264.


Sir William  I's family with Lucia (Lucy) Fitz Piers

They had two sons named Sir Robert  IV and William  II.

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