Her brother Henry, second Earl of Rutland
, was associated with extreme reformers including John Dudley (father of Lady Jane Grey
) and was imprisoned in July 1553 for supporting Lady Jane's claim to the throne.
Horton, Louise. “’Restore Me That Am Lost’: Recovering the Forgotten History of Lady Abergavenny’s Prayers”. Women’s Writing, No. 1, pp. 3 - 14.