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.
Erecura
The theonym is of unclear origin. It has been connected with Latin "aes, aeris" 'copper, bronze, money, wealth', "era" 'mistress' and the name of the Greek goddess Hera. Many different Latinised forms of this goddess’s name occur: "Aeraecura" at Perugia; "Aerecura" at Mainz, Xanten, Aquileia and Roşia Montană; "Aericura" at , "Eracura" in , "Ercura" at , "Erecura" at , Tongeren and Belley in Aube; "Heracura" at Stockstadt am Rhein, "Herecura" at , Freinsheim and Rottenburg am Neckar, where the form "Herequra" is also found.