Hesper Gamp

Hesper Gamp was a pure-blood witch who married Sirius Black II. The couple had three children together, Arcturus, Lycoris, and Regulus.

Etymology
Hesper is an English variation of the name Esther, which is believed to be derived from the Persian word for "star", possibly an allusion to the naming pattern of the family she married into. The Book of Esther in the Old Testament tells the story of Queen Esther, the Jewish wife of the king of Persia who saved her people from extermination.

Behind the scenes

 * Based on a statement of Horace Slughorn, Hesper Gamb may have been a member of Slytherin house, like her husband.
 * Gamp's Law of Elemental Transfiguration might have been discovered by Hesper or by a relative of hers.

Notes and references
Hesper Gamp