"Ohio, Marriages, 1800-1958," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XDC8-Y7C : accessed 26 Nov 2014), William Coyle in entry for Chester Arthur Coyle and Ola Huff, 23 Nov 1927; citing Butler County, Ohio, reference 2:3KMJC2Q; FHL microfilm 0355796.
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M94N-88Q : accessed 04 Dec 2014), William Coyle in household of Thomas J Coyle, Magisterial District 4, Horse Lick, Jackson, Kentucky, United States; citing sheet 1A, family 5, NARA microfilm publication T623, National Archives and Records Administration, Washington, D.C.; FHL microfilm 1240527.
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DNA Connections
It may be possible to confirm family relationships with William 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 some percentage of DNA with William: