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.
Aberri Eguna
"Aberri" is a neologism coined by Sabino Arana based on the suffix "-ba" which occurs in numerous kinship terms (e.g. "osaba" "uncle", "izeba" "aunt", "arreba" "sister of a man" etc.) from which he fancifully deduced a putative root *aba "father". He formed numerous neologisms based on this putative word such as "aberri" (*aba + "herri" "land, people, country, settlement"), "abizen" "surname" (*aba + "izen" "name") or "abenda" "race" (*aba + "enda" "lineage"). From "aberri" he then went on the coin "abertzale" "patriot" ("aberri" "fatherland" + "-(t)zale", a suffix denoting someone keen on something). In spite of their fanciful derivation, "aberri" and "abertzale" have found their way into general usage.