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Based on the Decennial U.S. Census data, the surname St. Clair has maintained steady popularity from 2000 to 2010. In both years, it was ranked as the 2318th most popular name in the United States, with an unchanged count of 14,296 individuals bearing this surname.
The surname St Clair was first found in Suffolk, where they held a family seat from very early times and were granted lands by Duke William of Normandy, their liege Lord, for their distinguished assistance at the Battle of Hastings in 1066 A.D.
The St Clair family name was found in the USA, the UK, Canada, and Scotland between 1841 and 1920. The most St Clair families were found in USA in 1880. In 1880 there were 265 St Clair families living in Pennsylvania.
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Stclair Name Meaning. English and Scottish: variant of Sinclair . This is also a French Canadian and American French altered form of the same surname. French ( Saint-Clair ): habitational name from any of several places, e.g. in Normandy, named Saint-Clair (from the dedication of their churches to Saint Clarus). Compare Saintclair .
The St. Clair family name was found in the USA, and the UK between 1880 and 1920. The most St. Clair families were found in USA in 1880. In 1880 there were 223 St. Clair families living in Missouri.
