Geburt, Familie: "Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J48W-VK5 : 26 December 2014), Wilhelm Jonen in entry for Peter Franz Hubert Jonen and Maria Sibilla Kollenbroich, 30 Apr 1875; citing Hülchrath (Neukirchen), Rheinland, Preußen, Germany; FHL microfilm 995,023.