Gender Male
Family Gussie (nephew),
Madison (niece),
Ladonna (niece),
Bud (nephew)
Job Clown
Cartoon debut "Fern and the Case of the Stolen Story" (mentioned only)
Uncle Silas is Ladonna's uncle. Fern used Silas as inspiration for a fictional character named Uncle Cyrus.

Uncle Silas works as a clown and has a crazy hairdo. He owns a pet parrot that tells jokes that Ladonna deemed "terrible". The parrot once got lost. He had bought the parrot from a pet store in the mall.