Special Agent Aloysius X. L. Pendergast, FBI agent & protagonist in the Pendergast novels by DouglasPreston & Lincoln Child Theodore Aloysius Huxtable is the son of Heathcliff "Cliff" and Clair on the American sitcom The Cosby Show.
Aloysius "Alo" Creevey on BBC's "Skins" Franklin Aloysius Mumford - "My Wife and Kids"
Aloysius Minch, father of the antagonist of MOTHER 2 and MOTHER 3
Brother Aloysius, an alias of bad hat and murderer Henry Meats in "Sinister Street" (1913) by Compton Mackenzie
Aloysius is Sebastian Flyte's teddy bear in Evelyn Waugh's novel Brideshead Revisited (1945)