Louis IX. disapproved and stopped the alienation of Courtenay (Ducange, l. iv. c. 23). It is now annexed to the royal demesne but granted for a term (engage) to the family of Boulainvilliers. Courtenay, in the election of Nemours in the Isle de France, is a town of 900 inhabitants, with the remains of a castle (Melanges tires d'une Grande Bibliotheque, tom. xlv. p. 74 - 77).