My great-great-great-grandfather was Mathias Adam from Prussia. He married Margaret as a second wife. They came to the US together, first to Wisconsin, then Illinois, then Iowa. Mathias and Margaret Adam hat several children, among them Henry und Nicholas. Mathias, Margaret, Henry and Nicholas were all born in Europe.
Mathias was born in Wormeldingen, which is in Luxembourg today. Margaret was from Wincheringen which belanged to Luxembourg until 1815, afterwards it was prussian territory and today is german.
Henry married Catherine Schloeder, Nicholas married Wilhelmina Gardner. These marriages took place in the USA.
Nicholas died in around 1888, his head was kicked by a horse.