Descendants of Karl, Fritz or Ida Wolter

Looking for information on and descendants of siblings Fritz and Ida Wolter.Fritz and Ida were the children of Karl and Elise (Heberlein) Wolter.I have no birth years for either parent nor child.Elise did have a brother born in 1848.This family lived in or near Koslin, Pommerania.Karl Wolter died about 1911 and mentioned both children in his will.He wrote that his son was living in New York at the time.

Thanks,
Sue