René de La Croix, count de Castries was a French historian and a member of the House of Castries. He was the sixteenth member elected to occupy seat 2 of the Académie française in 1972. He wrote under

The House of la Croix de Castries is a French noble family from Languedoc. The city of Castries in the Caribbean island of Saint Lucia was named after one of its members.