"Minnesota Marriages, 1849-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FD67-SZH : 10 February 2018), Rudolph Ayd and Christina Juenemann, 22 Nov 1887; citing St. Paul, Ramsey, Minnesota, reference p 279, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 1,314,555.