Could this be your Wilhem? "New York, New York City Municipal Deaths, 1795-1949", database, FamilySearch(https://www.familysearch.org/ark:/61903/1:1:2WVM-GL2 : 3 June 2020), William Reis, 1887.
"New York Naturalization Index (Soundex), 1792-1906," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:QVTW-NSP4 : 19 February 2021), Wilhelm Reis, 1847; citing , New York, New York, United States, Index to Naturalization Petitions filed in Federal, state and local court in New York, 1792-1906, NARA microfilm publication M1674 (Washington D.C.: National Archives and Records Administration, n.d.), roll 221; FHL microfilm 1,462,586.
Try FamilySearch.org (a free site) use the Search function and enter all the information you have. I found several Wilhem Reis records. The site is free and easy to use.