Aussiedler and Spätaussiedler
Resettlers and late resettlers (German: Aussiedler und Spätaussiedler) refers to immigrants of German descent who returned to the Federal Republic of Germany from a state of the former Eastern Bloc to settle there. Until the end of the 1980s, most came from Poland and Romania; since 1990, mostly from the successor states of the Soviet Union.
Source: Wikipedia — Aussiedler and Spätaussiedler (CC BY-SA 4.0)