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Male William de Ros IV Baron Ros Click to view William de Ros IV Baron Ros in the family tree

William de Ros IV was born in 1290 in of Helmsley, Yorkshire.  William de Ros IV's father was William de Ros III Baron Ros of Belvoir and his mother was Maud de Vaux.  His paternal grandparents were Sir Robert de Ros IV Baron Ros of Belvoir and Isabel de Albini; his maternal grandfather was John de Vaux of Freston. He had two brothers and three sisters, named John, Thomas, Agnes (Anne), Mary and Margaret.


William de Ros IV's first family with Margery de Badlesmere

‌William de Ros IV and Margery were married in a religious ceremony in 1326 in Castle Wark, Northumberland.  They had two sons and four daughters, named William, Thomas de Ros, Alice, Elizabeth, Maud and Milicent.


William de Ros IV's second family with Margaret de Neville


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