Your John H. Danek married Anna Kutina, who I believe was the sister of my great great grandmother Frances Kutina Kadlec (b. 26-Feb-1848, d. 13-Dec-1919) who married Josef V. Kadlec (b. 8-Jul-1838, d. 4-Aug-1902) and eventually made the trip to Silver Lake, McLeod County, Minnesota in 1867.
There was eventually a marriage between the Kadlec and Danek families of the Silver Lake area:
Josef and Francis Kadlec had a daughter Francis (b. 18-Sep-1867, d. 14-Sep-1947) who married John Danek, who was a druggist in Minneapolis. They had one daughter, Blanche Kadlec Small.
I've attached an image file of the Kutina-Danek-Kadlec connection. There is some other history on the Danek family in the 1978 McLeod County history book--let me know if you have any other questions.
I'd like to learn more about the Kutina family if you have any info, please email it to me.
St. Paul, Minnesotatkadlec@gmail.com