Jewish immigration, which increased in East Prussia particularly after the Crimean War (1853-1856) because of an immigration policy that had been liberal for decades, brought especially young Litvak families to the region. They came with the decided endeavour to leave a part of their Litvak traditions behind and to establish themselves in Prussia. Which Jewish identity did they pass on to their children, who grew up as citizens of the Reich? And how did the identity of the grandchildren’s’ generation unfold? That very prominent change of identity is shown on the basis of one family that proves to be exemplary for Jews who immigrated in the second half of the 19th century. Several generations can be defined. The generation of the immigrants had children who explicitly felt German. The life of the grandchildren was connected to the decision for forced migration and thus with commitment to a new chosen homeland (in most cases, Palestine), in which the mental relationships to their home region were shaped in a very ambivalent way.