|First appearance||The Secret of NIMH (1982)|
|Relatives||Mrs. Brisby (wife), Teresa Brisby, Cynthia Brisby (daughters), Martin Brisby and Timothy Brisby (sons)|
|Friends||Mr. Ages, Nicodemus and Justin|
Jonathan Brisby was the deceased husband of Mrs. Brisby and father of Teresa, Martin, Cynthia and Timothy. His voice was never heard. He was the bravest of all of the 20 rats and 11 mice of NIMH. Without his bravery, none of them would have survived escaping through the venitalation system. He was, according to a journal Nicodemus wrote, killed drugging Farmer Fitzgibbons' cat Dragon.