"Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J4PQ-2BM : 26 December 2014), Adolphus Proepper and Clara Oebels, 24 Nov 1799; citing Katholisch, Nettesheim-Butzheim, Rheinland, Prussia; FHL microfilm 176,129.