Biblical name, from the Greek form (used in the New Testament) of the name of the prophet Elijah. It is one of a number of Old Testament names which have come back into favour since the latter part of the 20th century. See also Ellis.
English and French: from the Middle English, Old French personal name Crispin, Latin Crispinus, a family name derived from crispus ‘curly-haired’ (see Crisp). This name was especially popular in France in the early Middle Ages, having been borne by a saint who was martyred at Soissons in AD c. 285 along with a companion, Crispinianus (whose name is a further derivative of the same word).