Isabel Sinclair was born about 1670, in Fossoway and Tulliebole, Kinross-shire, Scotland, United Kingdom as the daughter of Sinclair. She married James Gibson on 12 February 1695. They were the parents of at least 2 sons and 2 daughters. She died in Tulliebole, Kinross-shire, Scotland, United Kingdom.
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.