Maternal relationship is confirmed by an AncestryDNA test match between K Yager and her second cousin. Their MRCAs are their great-grandparents, Francis Yager and Nettie Burrell. Predicted relationship from AncestryDNA: 3rd Cousins, based on sharing 148 cM across 9 segments; Confidence: Extremely High.
"Michigan, Marriage Records, 1867-1952", Richard Blaine Ouderkirk and Jane Gertrude Cluley, 25 Mar 1950; Michigan Department of Community Health, Division of Vital Records and Health Statistics; Lansing, MI, USA; Michigan, Marriage Records, 1867-1952; Film: 95; Film Description: Isabella (1946) - Jackson (1927). [database on-line : accessed 29 March 2018]. Provo, UT, USA: Ancestry.com Operations, Inc., 2015.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JPYR-M4W : 20 May 2014), Richard B Ouderkirk, 04 Nov 1999; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
Find A Grave, database and images (findagrave.com : accessed 29 March 2018), memorial page for Richard B. Ouderkirk (1928–1999), Find A Grave: Memorial #58664593, citing Vernon Township Cemetery, Vernon Township, Isabella County, Michigan, USA ; Maintained by Sandra Moore (contributor 47025864)
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XQB7-FH5 : accessed 27 March 2018), Richard Onderkirk in household of Karl Onderkirk, Isabella, Isabella, Michigan, United States; citing enumeration district (ED) ED 11, sheet 2B, line 61, family 31, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 995; FHL microfilm 2,340,730.
"1940 United States Federal Census", Richard Ouderkirk in the household of Carl Ouderkirk. Year: 1940; Census Place: Vernon, Isabella, Michigan; Roll: m-t0627-01766; Page: 2B; Enumeration District: 37-22; United States of America, Bureau of the Census. Washington, D.C.: National Archives and Records Administration, 1940. T627, 4,643 rolls. [database on-line : accessed 29 March 2018]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
It may be possible to confirm family relationships with Richard by comparing test results with other carriers of his Y-chromosome or his mother's 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 Richard: