Maria Isabella Smyth (1819–1854)
Maria Isabella FitzRoy (1854–1889)
Daughter of John Henry Smyth of Heath Hall, Wakefield, Yorkshire. Second wife of Robert FitzRoy, whom she married in 1854.
Burke’s peerage 1999, s.v. Grafton, duke of
County families 1864, s.v. FitzRoy, Robert
London, England, Church of England births and baptisms, 1813–1916 (Ancestry.com, accessed 9 November 2017)