My mother's half brother is Karl-Heinz Ahrens. He was born in Germany, between 1948 and 1955, to Hannelore Magdalene Ahrens (nee Wedemeyer) and Karl Ahrens. I know I don't have a lot here to go on...my mother has tried searching for him through Red Cross, with no success, since the early 1980's. So now I'm giving it a try. My grandmother married four times, so other than Wedemeyer and Ahrens, she could have gone by the last names of Klinger, Schroder, or Marschenkow.