 The municipality's current name, Nanzdietschweiler, was coined in 1968, arising along with the territorial and administrative reform that was then ongoing, and under which, these three (originally four) villages were merged into one municipality.All the historical village names in question have the common German placename ending "—weiler", which as a standalone word means “hamlet” (originally “homestead”), to which was prefixed either "Diezo" in Dietschweiler's case, or "Nando" or "Nanzo" in Nanzweiler's case, each believed to have arisen from a personal name.Thus, it is believed that Dietschweiler was originally “Diezo’s Homestead”, although it is difficult to determine today just when the village was founded.