Matthias ben's father is Asom. He is an only child.
General Notes
mat-a-thi'-as (Mattathias). The persons of this name in the Apocrypha a re: (6) One of the sons of Asom who put away his "strange wife" (1 Esdras 9 :33) = the King James Version "Matthias" = "Mattattah" of Ezra 10:33.