Character:Marius Black

From UnknowableWiki

Marius Black is a member of the pure-blood Black family and the third child of Cygnus and Violetta Black (née Bulstrode). He has three siblings: Pollux, Cassiopeia and Dorea. He is a Squib, and because of that was burned off the Black Family Tree.

Marius was presumably born between 1915 (Cassiopeia's birthyear) and 1920 (Dorea's birthyear). Given the short average life span of the Blacks, he is likely to be deceased (BFT).