Sir Richard Jennings MP (c. 1619 – 8 May 1668) was an English nobleman and politician who sat in the House of Commons at various times between 1642 and 1668.
Jennings fought for the parliamentary cause in the Civil War, and was captured by the Royalists and imprisoned for some time.
Frances, nicknamed "La Belle Jennings", became maid of honour to the Duchess of York in 1664, and eventually by her second marriage to Richard Talbot became Countess of Tyrconnel.
Sarah married John Churchill, the future Duke of Marlborough, in 1677, and was highly influential during the reign of Queen Anne.
Abigail Masham, who ultimately supplanted her as the Queen's confidante, was a first cousin of Sarah, the child of Elizabeth Jennings Hill, one of Richard's 21 siblings.