John and Josephine Knadle and three sons born in Bohemia were one of the early Czech families in Hillsboro, Wisconsin, area, arriving before 1860 census. Based on recent research I find that the family name was recorded in Bohemia as Knedlhans which is also the name recorded for them on the New York ship arrival record.
Last evening I found baptism records for the three sons listed in the 1860 census as born in Bohemia:
Wencil: "Wenceslaus Knedlhans," born 12 Aug 1845, at Kocin near Kralovice (source: RC church baptism record in Kralovice book 12, image 65 of 107, on actapublica.eu)
Frank: "Frantisek Knedlhans," born 7 Oct 1853, at Kocin near Kralovice (source: RC church baptism record in Kralovice book 20, image 27 of 72, on actapublica.eu)
Anton: "Antonin Knedlhans," born 20 May 1856, at Bertin nad Civice (source: RC church baptism record in Plana book 33, image 48 of 201, on actapublica.eu); the baptism record includes a later added note about his emigration to America dated 2 Aug 1858.
The parents listed for these three are Jan Knedlhans, son of Jan Knedlhans of Kocin, and Josefa Fanta, daughter of Josef Fanta of Kacerov. Jan and Josefa are Czech for John and Josephine. Kacerov is just south of Civice which is separated from the Kocin area by a small river or creek valley.
The first two sons listed above were born at their father's hometown and third was born near his mother's hometown of Kacerov.
The family is recorded in the arrival list dated 18 Oct 1858 for Ship Fides as "Knedelhans" with first names: "Joh., Josepha, Wenzel, Frans, and Anton". The correct age is recorded for father Jan/John but not for other four. Obviously wrong ages are recorded for other families so probably a too hurried transcription of the German passenger manifest by the American immigration clerk? Note that another Czech family that came to Vernon County, Wisconsin, was on the same ship and listed at the top of the same page in the arrival list: Wencil Stanek with wife Catherine and three children (Thomas, Marie, and Wencil).
The Knedelhans name was first brought to my attention by Brett Ruzek who mentioned that a Martin Knedlhans settled in Kewaunee County and was from Kralovice area. That slight hint panned out for tracing Knadle family of Hillsboro back to Bohemia. Will look for possible relationship between Martin and Jan/John.