 Paul Hay du Chastelet Jr.

Paul Hay du Chastelet Jr. (born 1619, died ca.1682) was a military strategist and author known for writing the "Traite de guerre, ou Politique militaire" and the son of Paul Hay du Chastelet (1592–1636), who he is often confused with, and the nephew of Daniel Hay du Chastelet (1596–1671), a priest and mathematician.