Ashriel ben's father is מנשה. His paternal grandparents were יוסף and אסנת. He is an only child.
General Notes
Of the sons of Manasseh: [unclear whether this child is the son of Mana sseh orGilead]... And of Asriel, the family of the Asrielites Is Asriel a son or a grandson of Manasseh? Likewise, Shemida. A son of Manasseh or of Gilead ben Machir? Numbers 26 is not clear about these relationships.