She married Robert Williamson at Parish of Fraserburgh, Aberdeenshire, Scotland, on 14 September 1845.1 As of 14 September 1845, her married name was Margaret Williamson.
- [S2970] LDS Church, International Genealogical Index, "Robt. Williamson, male. Spouse: Margt. Blackhall. Marriage: 14 SEP 1845 Fraserburgh, Aberdeen, Scotland."