The Roman History · Amm. 15.10.9

The first of them, near the maritime alps, was made by the Theban Hercules, when he was proceeding in a leisurely manner to destroy Geryon and Tauriscus, as has already been mentioned; and he it was who gave to these alps the name of the Grecian Alps. In the same way he consecrated the citadel and port of Monæcus to keep alive the recollection of his name for ever. And this was the reason why, many ages afterwards, those alps were called the Penine Alps.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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