 The name Hammerstein can be traced to the in Vohwinkel, now part of Wuppertal, Germany.Wuppertal in its present borders was formed in 1929 by merging the early industrial settlements of Barmen and Elberfeld with Vohwinkel, Ronsdorf, Cronenberg, Langerfeld, and Beyenburg.The initial name of the town, "Barmen-Elberfeld", was changed in a 1930 referendum to Wuppertal (“Wupper Valley”).