When Mary E Floyd was born on 20 September 1864, in Philadelphia Monthly Meeting, Philadelphia, Pennsylvania, United States, her father, William Henry Floyd, was 27 and her mother, Adaline Rosine Stierly Kline, was 23. She lived in Philadelphia, Pennsylvania, United States in 1870. She died on 15 February 1948, in Philadelphia Monthly Meeting, Philadelphia, Pennsylvania, United States, at the age of 83.