Alexandre Berthier

Alexandre Berthier (1638–1708) was a captain in the Allier Regiment of the French Royal Army and later a seigneur in New France. Born into a Huguenot family, he was named Issac at birth but adopted the name Alexandre after converting to Roman Catholicism in 1665. He served under Alexandre de Prouville de Tracy during the capture of Cayenne (a former French colony in Guiana) from the Dutch in May 1664, deployed with Tracy to New France in 1665, and was part of a major expedition against the Mohawk in the fall of 1666.