Eureka, California
"Eureka" received its name from a Greek word meaning "I have found it!" This exuberant statement of successful (or hopeful) gold rush miners is also the official motto of the State of California. Eureka is the only U.S. location to use the same seal as the state for its seal.
Etruscan civilization
No etymology exists for "Rasna", the Etruscans' name for themselves. The etymology of "Tusci" is based on a beneficiary phrase in the third Iguvine tablet, which is a major source for the Umbrian language. The phrase is "turskum ... nomen", "the Tuscan name", from which a root *Tursci can be reconstructed. A metathesis and a word-initial epenthesis produce "E-trus-ci". A common hypothesis is that *Turs- along with Latin "turris", "tower", come from Greek , "tower." The Tusci were therefore the "people who build towers" or "the tower builders." This venerable etymology is at least as old as Dionysius of Halicarnassus, who said "And there is no reason that the Greeks should not have called them by this name, both from their living in towers and from the name of one of their rulers."