Ever since Hopf published his history of mediæval Greece writers on that subject have followed his opinion that the name of Navarino was derived from the Navarrese Company, which entered the Morea in 1381 to support the claims of Jacques de Baux, titular emperor of Constantinople and prince of Achaia, and which established its headquarters at the classic Pylos. Hopf adduces no evidence in support of this derivation, which he thrice repeats[60], except that of the French traveller De Caumont, who saw at Pylos in 1418 _ung chasteau hault sur une montaigne que se nomme chasteau Navarres_[61]. But his opinion, mainly formed in order to controvert the anti-Hellenic theory of Fallmerayer, has been followed, also without proof, by Hertzberg[62], Tozer[63], and more tentatively by Paparregopoulos[64]. The name of Navarino, however, seems to have existed long before the Navarrese Company ever set foot in Greece. Nearly a century earlier a golden bull[65] of the Emperor Andronikos II, dated 1293, confirmed the possessions of the church of Monemvasia, among which it specially mentions τὴν Πύλον, τὸν καλούμενον Ἀβαρῖνον. A little before the date of this imperial document (1287-1289) Nicholas II de Saint-Omer, lord of half Thebes, was bailie of the principality of Achaia for Charles II of Naples, and the Greek _Chronicle of the Morea_[66] tells us that ἔχτισεν τὸ κάστρον τοῦ Ἀβαρίνου. Now Hopf himself thought that the French version of the _Chronicle, Le Livre de la Conqueste_[67] (in which the above passage runs _ferma le chastel de port de Junch_), was the original of the four editions which we possess. It is generally agreed that the French version was written between 1333 and 1341; but it is by no means certain that the French is the original and the Greek a translation; rather would it appear that the Greek was the original, in which case it was composed in the early part of the fourteenth century, for the one passage[68] which refers to an event as late as 1388 is regarded as an interpolation by the latest editor of the _Chronicle_, Dr Schmitt. Even the most recent of all the four versions—the Aragonese—was written, as it expressly says[69], no later than 1393. Therefore we have every reason for regarding the mention of the name Ἀβαρῖνος in the Greek _Chronicle_ as a second proof that it was in common use long before the time of the Navarrese[70].