In 1771 Kennicott married Ann Chamberlayne, sister of Edward Chamberlayne the Treasury official, and sister-in-law of William Hayward Roberts. She survived him by many years, dying in 1831.[4] A friend of Hannah More, she knew Hugh Nicholas Pearson and was influenced by his evangelical faith. With Pearson as executor, she left property from the Chamberlayne estate in Norfolk to endow the two Hebrew scholarships at Oxford, mentioned above.[5]