Mary was born May 27, 1931 in Indianapolis to Everett and Olive (Persinger) Coonfield. Mary completed her GED while working and took courses in nursing. She married Donald L. Endicott, Sr. in Indianapolis on May 7, 1949. They enjoyed nearly 45 years together. Don Sr. died in 1994. Mary and Don moved to Southern California in 1962, then to Saddlebrooke, Arizona in 1990 where they were active contributors in the early days of their adopted community. Mary volunteered as a hospital aide, teacher's aide, stroke victim aide, and at a well-baby clinic. She enjoyed bridge, dancing, travel, reading, crafts, her nightly popcorn, and a glass of wine with friends.