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.
Erlking
It has been suggested, that the term may derive not from "elf-king" but from the name of "Herla", a figure in medieval English folklore, adapted as "Herlequin", "Hellequin" in medieval French, in origin the leader of the Wild Hunt, in French known as "maisnie Hellequin" "household of Hellequin" (and as such ultimately identical with Woden), but recast as a generic "devil" in the course of the Middle Ages (and incidentally, in the 16th century also the origin of the Harlequin character). Sometimes also associated is the character of "Herrequin", a ninth-century count of Boulogne of proverbial wickedness.