Shannon, Margaret Cather (1915-1996) (half of the “twinnies”). Cather’s niece. Margaret and her twin sister Elizabeth were born in Lander, WY, to Roscoe and Meta Cather, and moved with the family to Casper, WY, in 1921. Elizabeth and Margaret both attended the University of Colorado, graduating in 1937, and visited Willa Cather and Edith Lewis on Grand Manan during the summers of 1936 and 1937. In Cather’s later letters to them, she often refers back to their summer visits as a magical time. Margaret moved to Colusa, CA, with her parents in 1937. After she married Richard Shannon in September 1938, she moved with him to Boston, MA, where he earned an MBA from Harvard University in Cambridge. In 1940 they moved to the New York City area, where their first child, Richard, was born in 1943. The Shannons moved to Washington, DC, in 1944, where their daughter Kathryne was born. Cather did not see Margaret again after she left New York, and Margaret’s other three children, Patricia, Margaret, and Elizabeth, were born after Cather’s death. Kathryne and Patricia became caretakers for a large family archive of letters preserved by their mother, which they donated to the University of Nebraska-Lincoln as the Roscoe and Meta Cather Collection.

Mellen, Mary Virginia Auld (1906-1982) (“Virginia,” “M.V.”). Cather's niece. Born in Red Cloud, NE, to Jessica Cather Auld and James William Auld, Mary Virginia graduated from Red Cloud High School in 1924 and then spent a year at Dana Hall in Wellesley, MA, to qualify for admission to Smith College in Northampton, MA. In 1929 she received an A.B. in psychology from Smith and then moved to New York City, where she found work at Lord & Taylor before telling her aunt of her arrival. In 1930, probably with Willa Cather's help, she secured a position in the Circulation Department of the New York Public Library. In 1931, she entered the library's internal training school and in 1932 was assigned to the Tremont branch library in the Bronx. After Mary Virginia’s parents divorced in 1933 Cather took a quasi-parental role. She paid for vacations and when, in 1935, Mary Virginia married Richard (Dick) Mellen, a graduate of Harvard Medical School and roommate of her brother William Thomas Auld at Amherst College, she supervised wedding arrangements. After Dick was commissioned as a doctor in the Air Force, Mary Virginia—much to Cather’s regret—accompanied him to Chattanooga, TN, where he was assigned. In Cather's will, Mary Virginia was designated a beneficiary of the literary estate.