Did Families Live on Alcatraz Island?

No. Alcatraz Island (San Francisco Bay) was a federal penitentiary (1934–1963) housing notorious criminals (Capone, "Birdman" Stroud). The only residents were inmates, guards, and staff. Some guards' families lived in apartment buildings on the island, but no civilian families resided there. The island had no schools, stores, or community infrastructure for families.