Otto Ratburn

Mr. Ratburn's father is the father of Arthur's third grade teacher Mr. Ratburn and substitute teacher sister Miss Ratburn and husband of Mrs. Ratburn. He was only shown during a flashback in 1001 Dads in a late 1960s-style timeline. As his son is now a teacher at Lakewood Elementary School, it is likely that he is currently middle-aged.

Appearance
During his only appearance in a flashback, he looks much like his son, but with slightly more hair that is colored brown and was wearing half-glasses, a white shirt, khakis with suspenders, and dark gray loafers.