Elizabeth Knyvett
married Thomas Clinton, Earl of Lincoln
, an Oxford
graduate; if her generally accepted birth-date is accurate, she was legally married as a child.
Cokayne, George Edward. The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct, or dormant. Editor Gibbs, Vicary, St Catherine Press, 1910–1959, 14 vols.
7: 695
Matthew, Henry Colin Gray et al., editors. Oxford Dictionary of National Biography. http://www.oxforddnb.com/.