Her father was created Earl of Essex in 1572, and her brother, Robert Devereux, Viscount Hereford, inherited the Earldom of Essex on their father's death in 1576.
Her father was created Earl of Essex in 1572. Her brother inherited the Earldom of Essex on their father's death in 1576. Robert Devereux was her brother. Robert Devereux was Viscount Hereford.