 Other forms that the name has taken have been, among others, "Gumeswilre" (14th century), "Gummeßwilre" (1416), "Gomßwillr" (1458) and "Gumbsweiller" (1593).Obereisenbach was named for the brook that flows by it, the Eisenbach ("Ironbrook"), and the prefix is German for "upper", distinguishing it from Niedereisenbach ("Nether Ironbrook"), which lies at the brook’s mouth.The name first cropped up in the record in the form "Oberysenbach daz dorff und Geriechte" (modernized