Marie Cathcart, Countess Cathcart, British peeress (b. 1923)

Marie Isobel Cathcart, Countess Cathcart, DStJ (18 June 1923 – 25 February 2015) was a British peeress.

She was born Marie Isobel French, eldest daughter of the Hon. William Joseph French, a son of the 4th Baron de Freyne, and Victoria Louise (née Bellasis). She had three siblings. She was educated at Les Oiseaux, Westgate on Sea, Kent, and at Ware, Hertfordshire, by the sisters of the FCJ. She joined the Wrens as soon as she was old enough to do so in 1941 during World War II. She did voluntary work for various charities throughout her lifetime.