When Mary Agnes McKinney was born on 6 February 1862, in Ray, Missouri, United States, her father, Matthew McKinney, was 51 and her mother, Nancy Agnes McCreary, was 42. She married Sigal George Thomas Casper on 10 June 1890. They were the parents of at least 4 sons and 3 daughters. She lived in Empire Township, Andrew, Missouri, United States in 1880 and Richmond Election Precinct, Furnas, Nebraska, United States in 1900. She died on 30 November 1906, in Beaver City, Furnas, Nebraska, United States, at the age of 44, and was buried in Beaver City, Furnas, Nebraska, United States.
Scottish and Irish: Anglicized form of Gaelic Mac Cionaodha or Mac Cionaoith ‘son of ç’, an early Gaelic personal name popular from the ninth century and possibly derived from Pictish.
Irish (northern): Anglicized form of Gaelic Mac Coinnigh ‘son of Coinneach’, an Old Irish personal name, borne by a Christian saint and Anglicized in Ireland as Canice, which was treated in Scotland as equivalent to Kenneth . This surname was usually Anglicized in Scotland as McKenzie , but is otherwise hard to distinguish from sense 1 above.