Joseph Frank Kroll born Jan 14 1850 Waterloo, IL to Franz (Joseph) Kroll Sep 27 1807 & Gertrude Catherine Viermeier (est 1821) or Vienmeyer or ??. I cannot find any records for her. On the marriage document for. It shows her parents as Henry Viermeyer & Margarthe Westhoft. Last name could be incorrect, do to language barrier.
On Franz Joseph Kroll, I find he entered the states in New Orleans & Settled in the St Louis MO. He has his parents listed on marriage document as Caspar Kroll & Elizebeth Felton.
I am not able to trace this line any further back.