| Otto Ratburn | |
|---|---|
 Otto Ratburn in a flashback of Nigel’s childhood | |
| Gender | Male |
| Animal | Rat |
| Hair color | Brown |
| Complexion | Brown |
| Family | Olga Ratburn (mother) Hans Ratburn (father) Lisa Ratburn (wife) Nigel Ratburn (son) Rodentia Ratburn (daughter) Patty Ratburn (daughter) Grandchild Patrick Ratburn (son-in-law) |
| Book debut | Arthur and the 1,001 Dads |
| Cartoon debut | "1001 Dads" |
| Voiced by | Arthur Holden |
Otto Ratburn is the husband of Lisa Ratburn and the father of Nigel, Rodentia and Patty Ratburn. He was only shown during a flashback in "1001 Dads", when Nigel and him attended the Father's Day picnic.
Physical appearance[]
When Otto was younger, as seen in a flashback, he looked much like his son, but with longer brown hair. He was wearing half-glasses, a white shirt, khakis with suspenders and dark gray loafers.
Appearances[]
- "Background Blues" (Mentioned only) (First identified as Otto)
- "1001 Dads" (First appearance) (Flashback)
- Arthur and the 1,001 Dads