Achates

Etymology
From the "fidus Achates" (faithful Achates) of Virgil's Aeneid, the constant companion of Aeneas in his wanderings after the fall of Troy.

Noun

 * 1)  A trusty comrade.

Etymology
From.

Proper noun

 * , known as the place where agates were found, now the river Dirillo
 * 1) Achates (armorbearer and friend of Aeneas)