"Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JHHM-GS7 : 11 February 2018), Jacobus Foerster and Anna Gertrudis Koenen, 19 Aug 1792; citing Katholisch, Gruiten, Rheinland, Prussia; FHL microfilm 186,043.