Arthur Wiki
Silas
Gender Male
Family Gussie (older nephew)
Madison (older niece)
Ladonna (younger niece)
Bud (younger nephew)
Rufus Compson (brother or brother-in-law)
Cisely Compson (sister or sister-in-law)
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.