Jean-Marie Leclair l'aîné (Jean-Marie Leclair the Elder) (10 May 1697 – 22 October 1764) was a French Baroque violinist and composer. He is considered to have founded the French violin school. His brothers, the lesser-known Jean-Marie Leclair the younger (1703–77) as well as Pierre Leclair (1709–84) and Jean-Benoît Leclair (1714–after 1759), were also musicians.
Source : Wikipedia