Henrietta de Nassau d'Auverquerque (died 1747) (d. 1747) Parents Henry de Nassau d'Auverquerque, 1st Earl of Grantham Henrietta Butler Children George Clavering-Cowper, 3rd Earl Cowper Lady Caroline Cowper Siblings Thomas de Nassau, Viscount Boston Henry de Nassau, Viscount Boston Lady Emilia-Mary de Nassau Lady Frances de Nassau Partners William Clavering-Cowper, 2nd Earl Cowper