My g grandfather was Leonard KOEPF (Kopf?)b. c. 1861/2 in Germany (looks like Kirchen, Kuchen or Kirchheim, (Wurttemberg)) on his NYC marriage certificate (11/1/1890).His father was also named Leonard or Leonhard.
Leonard came to NYC and married Anna STETTNER.They had several (four?) children.
The story is that he wanted to go back to Germany but she, being a native of US, didn't.So he went alone and died back in Germany.