 His charters state that he had one son, but do not name him.The "princeps" Frithuric who was active in Mercia in the reign of Wulfhere's brother and successor Æthelred is presumed to be a kinsman of Frithuwald, perhaps his son.The twelfth century life of Saint Osgyth of Aylesbury states that Osgyth was the daughter of Wilburh, sister of King Wulfhere, and a certain King Fredeswald.