caption father death_date mother image_size title birth_date spouse issue image article_title name
arms castle blazon : '' gules , three water bougets argent of . '' robert de roos , lord of hamlake everard de ros , baron of helmsley 1227 roese trussebut 240px baron of helmsley sheriff of cumberland ca. 1170/1172 isabella mac william sir sir alexander de ros william ros robert de ros peter de ros coat of hamlake castle.png of arms of robert de roos , lord robert de ros -lrb- died 1227 -rrb-
 robert de ros
robert de ros -lrb- died 1227 -rrb-

sir robert de ros , or de roos of helmsley , -lrb- ca. 1170/1172 -- 1227 -rrb- , was the grandfather and ancestor of the barons ros of helmsley that was created by writ in 1264 .
in 1215 , ros joined the confederation of the barons at stamford .
he was one of the twenty-five barons to guarantee the observance of magna carta , sealed by king john on 15 jun 1215 .
