Her great-grandson, Granville Elliott, spent much time and trouble trying to prove that Catherine had legally married Richard Eliot, the wayward son of Sir John Eliot, and had a son and legal heir George Elliott (Granville's grandfather) by him around 1636.
General Granville Elliott (1713 - 1759) spent much time and effort trying to prove that Richard Eliot had married Catherine Killigrew (1618 - 1689), and had a child George Elliott born around 1636.
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Eliot was the son of Richard Eliot and his wife Harriot, illegitimate daughter of James Craggs the Younger by his mistress, the noted actress Hester Santlow.
Edward Craggs-Eliot, 1st Baron Eliot (London, 8 July 1727 – 17 February 1804, Port Eliot, Cornwall) was born to Richard Eliot (c.1694 – 19 November 1748) and Harriot Craggs (c.1704 – January 1769), the sister of the Privy Counsellor and Secretary of State, James Craggs (9 April 1686 – 2 March 1721) and Hester Santlow, the noted actress.