Cygnus Black III

Cygnus Black (1929 - 1979) was the youngest son of Pollux Black and Irma Crabbe. He married Druella Rosier, and the couple had three daughters: Bellatrix, Andromeda and Narcissa Black.

Behind the Scenes
Like many members of the Black family, Cygnus appears to be named for a constellation. Cygnus is Latin for "swan", and the constellation is connected to various stories in Greek mythology, notably Zeus's transformation into a swan in order to seduce Leda.