[2] At the time of their marriage, her husband's style was The Hon.
In 1660 he inherited his father's title of Viscount Valentia, making Elizabeth a viscountess, and in the following year he was created Earl of Anglesey, making her a countess.
Elizabeth was the daughter and co-heiress of Sir James Altham of Oxhey, Hertfordshire (son of James Altham), and his wife Elizabeth Sutton.
The countess's sister, Frances, married Richard Vaughan, 2nd Earl of Carbery.
[3][4] Elizabeth and her husband had seven sons and six daughters, including: The countess died some time in January 1697/8, and was buried at St Anne's Church, Soho.