United States writer whose novels argued for social reform (1878-1968)
"The novelist Sinclair wrote about labor struggles to advocate for social reform in his early 20th-century works."
English electrical engineer who founded a company that introduced many innovative products (born in 1940)
"The Sinclair brand is famous for its early innovations, but it was the vision of the eponymous engineer born in 1940 that truly launched the company."
A Scottish surname, from given names, that of a clan.
"The Sinclair family has lived in the Highlands for centuries as members of a powerful Scottish clan."
The surname Sinclair originated as a patronymic meaning "descendant of Saint Clare," reflecting that early members of the clan built their churches in her honor. This name traveled into English usage through Scottish families who adopted it to signify their religious dedication and lineage.