By court order dated 17 Jan 1900 Johannes is named the father of Phillip Rosenthal. No other details. I assume that Phillip was a child of Amalia Rosenthal (the future wife of Johannes) born illegitimately. Johannes may have been the birth father, or at least he was legally considered so.
[S377] 1886 Kukkus Family List, (Name: American Historical Society of Germans from Russia; Location: 631 D Street, Lincoln, Nebraska 68502-1149; Date: 2018;), Index # 3267.
[S377] 1886 Kukkus Family List, (Name: American Historical Society of Germans from Russia; Location: 631 D Street, Lincoln, Nebraska 68502-1149; Date: 2018;), Index # 3268-birth name Rosenthal.