Rebholz Family

My ggrandparents came to United States in 1884 from the port Havre. They were from Germany, Their names were Ambrose and Tekla Rebholz, They had a baby with them, Karl and a daughter Zazilia?
Tekla's parents were John and Mary Ann Rapp Goetz. This was noted on Tekla's death certificate.
This is all I know about them.
On the U.S. 1920 census it notes that Carl (Karl) was born in Wurttemberg, Germany.
If anyone can find birth records for him in Germany please let me know..