In the family of "Robert Grosvenour, of Ruddeheath ..." and "Emme, ... wife of Robert, 1322, 16 Edw. II. dau, of William Mobberley, ..." is listed "Robert, a younger son, he bought certayne lands in Chorley, 1349."
↑ Birth year estimated based on estimated birth year of his older brother Ralph, and on the fact that he bought land in 1349, so was presumably of age by then.