Eureka Classis
On June 7, 1911, seven ministers and sixteen congregations organized to form the Eureka Classis. The name of the Classis came from the Greek word ‘eureka’ which means ‘I found it’ and not on the town Eureka, South Dakota, where the second meeting of the Classis would be held. The name was designed to mean that they had found a solution to their doctrinal problems with the rest of the denomination.
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.