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.
Archena
The etymology of the word "Archena" is indisputably somehow related to the Indo-European root referring to "water" that appears in Arga, Erga, Arganzuela, etc., and, within the territory of Murcia, with the Argos river, Archena, Archivel, etc. The origin of the word "Archena" derives from Latin "arxila," which means clay, but over the years it turned into "Archena".