Dorea Black

Dorea Potter (née Black) (1920 - 1977) was a pure-blood witch and the youngest child of Cygnus Black I and Violetta Bulstrode. She married Charlus Potter, and the couple had one son James Potter. Through her niece Walburga Black, Dorea was the great-aunt of Sirius and Regulus Black, and through her nephew Cygnus Black II, she was the great-aunt of Bellatrix Lestrange, Andromeda Tonks, and Narcissa Malfoy.

She is also the grandmother of Harry Potter.

Etymology
The name Dorea may come from the names Dora ("gift") or Dorothy, which mean "gift of God" in Greek, or from dory, a type of small boat.

Behind the scenes

 * It has been speculated that Dorea and Charlus's son was James Potter I, father of Harry Potter, as his parents are said to have been older when they had him, and Dorea would have been forty years old when James was born . However, J.K. Rowling also said that James' parents were old in wizarding terms when they died , and Dorea would have only been fifty-seven years old at the time of her death . Dorea and Charlus may have been more distant relatives of James and Harry.