Fitzherbert, Mrs., a Roman Catholic lady, maiden name Maria Anne Smythe, with whom, after her second widowhood, George IV., while Prince of Wales, contracted a secret marriage in 1785, which, however, under the Royal Marriage Act, was declared invalid (1756‒1837).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Fitzgerald, Lord Edward * Fitzroy, Robert