Iola Ella Hitchens, née Black (1851-1911) was the youngest child of Cygnus Black I and Ella Max and younger sister to Hogwarts Headmaster Phineas Nigellus Black. She was disowned for marrying muggle Robert Hitchens.
Iola was plain looking and far less attractive then her sister Elladora Black, resembling their father more than her mother.
Iola was a loving girl who loved flowers and struggled with her love for florist Robert for a very long time.
Iola's brother and father died before she was born. She attended Hogwarts from 1863 to 1870 and was sorted into Slytherin House.
She married florist Robert Hitchens in 1875 and was disowned by her family. Only her mother would contact her ever so often. Iola tragically died in a car accident in 1911, leaving her husband broken and depressed. She would have wanted a child but the two were unable to have one.