My wife's great-grandmother was born in Columbia, Illinois and I'm working on filling out her family lines. Her great-grandmother was Theresa Eichmueller, the daughter of John Eichmueller and Margaret Koerber. She was born in October, 1867 and died in Osage County, Missouri in 1905. On November 22, 1887, she married Henry Neuner of Rich Fountain, Missouri. They were married in Monroe County, Illinois. She had two sisters that I've found: Mary born 1868 and Elizabeth, born in 1870. I have nothing more on them.
Her father John was born in Bavaria in 1841 and died in Illinois in 1912. He was the son of George Eichmueller (1806-1883) & Kunegunda Eichmueller (1816-1892) - both also born in Bavaria. I do not know Kunegunda's maiden name. Both are buried in Monroe County, Illinois.
Her mother, Margaret Koerber was also born in Bavaria in 1842 and she died in Illinois in 1883.
I have no idea whether George & Kunegunda had any other children, nor John & Margaret had any other children besides the three daughters.
BTW, Henry Neuner's family also came from Bavaria and I believe there were Eichmuellers in Osage County, Missouri where he was born and raised.
I'm just posting this in case anyone else is researching these families.