Arcturus Black III

Arcturus Black (1901 - 1991) was the eldest son of Sirius Black and Hester Gamp. He married Melania Macmillan, and they had two children, Lucretia and Orion Black. He was Sirius Black's paternal grandfather.

Behind the scenes

 * Based on a statement by Horace Slughorn,Arcturus may have been a member of the Slytherin House.