The Collaborative International Dictionary of English v.0.48:

Roquelaure \Roq"ue*laure\ (?; 277), n. [F.; so called after Duc
   de Roquelaure, in the reign of Louis XIV.]
   A cloak reaching about to, or just below, the knees, worn in
   the 18th century. [Written also roquelo.]
   [1913 Webster]