When Ethel May Atherstone was born on 19 November 1880, in San Francisco, San Francisco, California, United States, her father, Thomas Shelton Atherstone, was 37 and her mother, Emma Bithia Bridge, was 34. She married Charles Phelps Greenwood on 28 December 1910, in Oakland, Alameda, California, United States. They were the parents of at least 1 daughter. She lived in Spokane, Spokane, Washington, United States in 1920 and Piedmont, Alameda, California, United States in 1930. She died on 30 August 1964, in Los Angeles, Los Angeles, California, United States, at the age of 83.