"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KQ1H-8W4 : accessed 17 September 2016), Donald Fisher in household of Hume Colby, Holland, Holland Town, Erie, New York, United States; citing enumeration district (ED) 15-92, sheet 14B, family 308, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2529.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JGTG-ZWR : 20 May 2014), Donald E Fischer, 29 Mar 2010; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
It may be possible to confirm family relationships with Donald by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Donald: