In the family of "Sir Robert Grosvenour, knight, ... obiit 19 Ric. II" and "Joan, daughter of Robert Pulford, ..." is listed "Cecily, dau. of sir Robert, 1394."
Note that the line of descent is drawn incorrectly (implying that Cicely's mother was Robert's first wife instead of his second). There is a note to correct this in the Additions and Corrections section (3:450).
↑ Birth year estimated based on estimated birth year of her father, and year of death of her father's first wife.