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.
ETA (separatist group)
ETA grew out of a student group called Ekin, founded in the early 1950s, which published a magazine and undertook direct action. ETA was founded on 31 July 1959 as Euskadi Ta Askatasuna (Basque Homeland and Freedom) by students frustrated by the moderate stance of the Basque Nationalist Party. (Originally, the name for the organisation used the word "Aberri" instead of "Euskadi", creating the acronym "ATA". However, in some Basque dialects, "ata" means "duck", so the name was changed.)