 It is worth noting that Lois kept Jonas' last name although they had presumably been divorced for somewhere around ten years (assuming Jonas left before Carl was a year old and considering Carl is in fourth grade, which would make him nine or ten years old) at the series' beginning.Jonas Foutley is Ginger and Carl's biological father, who abandoned them and Lois sometime after Carl was born.Ginger never had any fond or, for that matter, clear memories of her father, and all the photographs of him that are in her possession are of his feet.