When Mary Sinclair was born on 17 December 1824, in Glasgow, Lanarkshire, Scotland, United Kingdom, her father, Daniel Sinclair, was 34 and her mother, Margaret, was 30. She married George Jamieson on 25 December 1843, in Kilbirnie, Ayrshire, Scotland, United Kingdom. They were the parents of at least 2 sons and 3 daughters. She lived in Old Monkland, Lanarkshire, Scotland, United Kingdom in 1841 and Kyle, Ayrshire, Scotland in 1851. She died about 1864, in Scotland, at the age of 41.
Scottish and English: of Norman origin, a habitational name from Saint-Clair-sur-Elle (Manche), so called from the dedication of its church to Saint Clarus (see Clare 3).
Americanized form of some similar (like-sounding) Jewish surname.
History: The Scottish family Sinclair (see 1 above) came to southern Scotland in the twelfth century from Huntingdonshire with the de Morvilles. Descendants of these Sinclairs became earls of Caithness in the 15th century. The frequency of the surname in Caithness and Orkney is largely due to the adoption by tenants of the name of their overlord.