This is the page for Lady Sybil Branson, daughter of Lord and Lady Grantham. For her daughter, see Miss Sybil Branson. Lady Sybil Cora Branson[2] (née Crawley; born April, May or June[3] 1895[4][1] — Between April and August 1920),[5] known mostly as Lady Sybil for most of Downton Abbey, was the youngest daughter of Robert and Cora Crawley, the Earl and Countess of Grantham, and the younger sister of Lady Mary and Lady Edith. Through her sister Mary, she was the sister-in-law of Matthew…