↑ "England Marriages, 1538–1973 ," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NJGJ-Z24 : accessed 19 October 2015), John Jackson and Ann Beaumont, 01 Jan 1860; citing Kirkheaton, York, England, reference yr 1857-1860 p 169; FHL microfilm 993,704.
↑ He appears in the 1901 census, but his wife is a widow in the 1911 census.
It may be possible to confirm family relationships with John 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 John: