The Prose Edda 1.54

Thereupon Gangleri heard great noises on every side of him; and then, when he had looked about him more, lo, he stood out of doors on a level plain, and saw no hall there and no castle. Then he went his way forth and came home into his kingdom, and told those tidings which he had seen and heard; and after him each man told these tales to the other.

[Here Wilken closes his edition; Jónsson admits the following:

But the Æsir sat them down to speak together, and took counsel and recalled all these tales which had been told to him. And they gave these same names that were named before to those men and places that were there, to the end that when long ages should have passed away, men should not doubt thereof, that those Æsir that were but now spoken of, and these to whom the same names were then given, were all one. There Thor was so named, and he is the old Ása-Thor.

All reject what follows:

He is Öku-Thor, and to him are ascribed those mighty works which Hector wrought in Troy. But this is the belief of men: that the Turks told of Ulysses, and called him Loki, for the Turks were his greatest foes.]