Irma Osthryth Black (née Crabbe; 1912-1968) was the wife of Pollux Black and mother to his three children:
- Walburga Irma Black (1929-1985), who married second cousin Orion and had two sons.
- Alphard Pollux Black (1930-1977)
- Cygnus Castor Black (1931-1992) who married Druella E. Rosier and had three daughters.
History[]
The daughter of Oswyn Crabbe and Walburga Crabbe (née Goyle), she was a few years older than Pollux and attended Hogwarts with him. She married Pollux Black after negotiations between her father and Pollux's father, Cygnus. She gave birth to Walburga at the age of 16 during her sixth year, and continued her education, after which she proceeded to have two sons; Alphard and Cygnus III.