Iola Black

Isla Hitchens (née Black) was a pure-blood witch and the sister of Sirius, Phineas Nigellus, and Elladora Black. She married a Muggle named Bob Hitchens, and was struck off the Black Family tree and disowned as a result.

Behind the scenes
Isla is the Spanish word for "island". It is also an archaic spelling of the Scottish island Islay, and the name of two rivers in Scotland.