Cygnus Black I

Cygnus Black (b. 1829) was a pure-blood wizard. He was an early member of the House of Black, and possibly the brother of Arcturus and Misapinoa and father of Phineas Nigellus and his siblings (Sirius, Elladora, and Isla), but his precise relationship to other known members of the Black family is unknown. He married Ella Max.

Behind the scenes

 * This character appears only on the version of the Black family tree shown in the film adaptation of Harry Potter and the Order of the Phoenix. He was not included on the version of the tree which J. K. Rowling gave to a charity auction in 2006. However, according to director David Yates, Rowling provided the filmmakers with a copy of the Black family tree going back eight generations. The filmmakers presumably received a more complete version of the tree than the one auctioned off, which only goes back six generations.
 * Cygnus was probably son of a wizard in a green hat.
 * Given his placement on the tree in the film, this character may have been the older brother of Arcturus I, and the father of Sirius I, Phineas Nigellus, Elladora (who would have been named after her mother Ella), and Isla.
 * Cygnus' grandson was named Cygnus II. Cygnus II's grandson was Cygnus III
 * Based on a statement of Horace Slughorn, Cygnus may have been a member of Slytherin House. However, he attended Hogwarts c. 1840 - 1847, when Slughorn was not Potions teacher.

Etymology
Cygnus means "swan". The Grandson of Cygnus I is named after him. Cygnus is also the name of a constellation, meaning the same thing as the name.

Appearances

 * Harry Potter and the Order of the Phoenix (film)