"Rodentia Ratburn's child" is not an official name.
Rodentia Ratburn's child
Age 0
Family Rodentia Ratburn (mother)
Nigel Ratburn (uncle)
Lisa Ratburn (grandmother)
Otto Ratburn (grandfather)
Cartoon debut "Desk Wars" (mentioned only)

News of the birth of Rodentia Ratburn's child was given to his or her uncle, Nigel Ratburn. In Desk Wars, Nigel goes on the phone and announces to his class that he is an uncle.

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