Looking for information on Jean Jacques (Jacob) Muller born around 1838 in what might be Siershahn. He married Marie Anne Schmidt. She had a brother named Christian. Jacob and Marie moved to Essen Germany where their daughter Catherine (Catherina) was born in 1872. Not sure if they were married before or after they moved to Essen. Catherina was baptized in St Johannes Parish in Essen. They also had a son Pierre Muller born in 1867.

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