When Mary Evans was born on 27 March 1829, in Ystrad-dyfodwg, Glamorgan, Wales, United Kingdom, her father, David Evans, was 28 and her mother, Ann Davis, was 32. She married William Nicholas on 23 September 1849, in Llanwonno, Glamorgan, Wales, United Kingdom. They were the parents of at least 6 sons and 5 daughters. She lived in Llantwit juxta Neath, Glamorgan, Wales, United Kingdom in 1851 and Ohio, United States in 1870. She died on 27 January 1872, in Hubbard, Trumbull, Ohio, United States, at the age of 42.