Lady Mary Josephine Crawley nee Crawley (born 1891)[1] is the eldest daughter and child of Robert Crawley, 5th Earl of Grantham and Cora Crawley. She has one child, a son, George Crawley, by her late husband and cousin, Matthew Crawley. She has two sisters: Lady Edith and the late Lady Sybil. She is the daughter-in-law of Isobel Crawley and the late Reginald Crawley. Tom Branson is her brother-in-law. The late 4th Earl of Grantham and Violet Crawley are her paternal grandparents, the late Isidore Levinson, and Martha Levinson her maternal grandparents. Lady Mary is also the aunt and godmother of Sybil Branson, Sybil and Tom's child. She has two uncles, Harold Levinson (her mother's brother) and the late Marmaduke Painswick (uncle by marriage to her father's sister) and one known aunt, Lady Rosamund Painswick (her father's sister). It is unknown if Harold has a wife, which would mean Mary has another aunt (by marriage).
Her father's estate and title, along with her mother's fortune, must pass to a male heir. Lady Mary is quite bitter about this, especially after the previous heirs die on the Titanic and an unknown distant cousin (Matthew) becomes the new heir. She has a strong will and can be quite selfish, arrogant and cold at times, but she cares greatly for her family and friends, of which Anna, the maid, and Mr. Carson, the butler, are included. Mary is used to getting all the attention, especially from men, which is a point of contention with her sister Edith.
With the death of her husband in September 1921, Mary lost her chance to become Countess of Grantham. Her son will inherit the title upon her father's death.