House of De Ros
de Ros, Ros, Roos, Ross, etc.
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House of De Ros
Lords of Holderness, Belvoir, Hamlake and Helmsley
Barons de Ros
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House Ros of Wark
Lords of Wark and Kirkby Kendal
Issued from Robert, 2nd son of Robert de Ros of Hamlake
Robert de Ros, 3rd of Wark was created 1st Baron de Ros of Wark but was attainted for treason -
House Ros of Kendal
Lords of Downham and Kendal
Issued from William, 2nd son of Robert de Ros of Wark and younger brother of Robert de Ros, 1st Baron de Ros of Wark -
House Ros of Ingmanthorpe
Lords of Ingmanthorpe, Laxton, Egmanton and Sneinton
Issued from William, younger son of William de Ros of Hamlake and uncle of William de Ros, 1st Baron de Ros -
House Ros of Youlton
Lords of Youlton, Ringborough, Skipsea and Cleeton
Issued from Alexander, 3rd son of Robert de Ros of Hamlake and uncle of William de Ros, 1st Baron de Ros -
House Ros of Gedney
Lords of Gedney
Issued from Robert, younger son of Robert de Ros of Hamlake and Helmsley and younger brother of William de Ros, 1st Baron de Ros
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John de Ros
Lord of Watton
2nd son of William de Ros, 1st Baron de Ros