No naturalization I could find for either. But then, I have only online sources. The couple have varying amounts of children when arriving in America depending on where you look.
According to census: Anna & Emma (1855-1856), Joseph (1857), Francis (1859) and Wesner (1861). I have cross-checked with FamilySearch but I think the Mormons do not have a lot of Czech records.
According to the Kosmos 1867 manifest Frantz (1864~) Caroline & Wesner (1866), Anna & Emma (1857). Thanks for the additional links!