He [John de Thorpe] married Margaret, sister and (in her issue) coheir of Bartholomew DE CREKE, of North Creake, Norfolk, and Combs, Suffolk, daughter of Robert DE CREKE, of the same, presumably by his 1st wife, Agnes, daughter of William DE GLANVILLE (a). The dates of their deaths are not known. [Complete Peerage XII/1:717-8, (transcribed by Dave Utzinger)]