Alphard Black

Alphard Black was the middle child of Pollux Black and Irma Crabbe. He was disinherited and removed from the Black Family tree by his sister, Walburga Black, for giving "a decent amount of gold" to his runaway nephew, Sirius Black.

Name etyomology
Alphard is the name of a star in the constellation Hydra. The star is also known as heart of the serpent.

Notes and references
Harry Potter and the Order of the Phoenix, US hardback page 111