A birth record for a John Dubnil, son of Augustus and Elizabeth, was found in Schodack, Rensselaer, New York vital records, with a date of July 3, 1849[4] - it is likely that this is his birth record, based on the fact that his parents were residing in Schodack as of the 1850 census, despite the fact that a different name is listed.
Sources
↑ "Illinois, Cook County Deaths, 1871-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2MQ-16X2 : 8 March 2018), William Du Breuil, 14 Nov 1916; citing Chicago, Cook, Illinois, United States, source reference 31562, record number , Cook County Courthouse, Chicago; FHL microfilm 1,276,310.
↑ "Illinois, Cook County Deaths, 1871-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N7S9-9DC : 8 March 2018), William Du Breuil, 14 Nov 1916; citing , Cook, Illinois, United States, source reference cn 31562, record number 62, Cook County Courthouse, Chicago; FHL microfilm 1,276,310.
↑ Thornton Township Cemetery (Thornton, Illinois, USA). Personally transcribed, 7 December 2007. Copy in the files of David Holmer, also viewable at Find A Grave: Memorial #73629310
"US Census, 1850", database online. Schodack, Rensselaer, New York, USA; Page 427, Family 3101, Dwelling 2758, Lines 1-9; November 9, 1850; National Archives image at ancestry.com.
"US Census, 1860", database online. Lyons, Cook, Illinois, USA; Page 200, Family 1432, Dwelling 1510, Lines 14-18; June 27, 1860; National Archives image at ancestry.com.
"US Census, 1870", database online. Saint John, Lake, Indiana, USA; Page 7, Family 44, Dwelling 44, Lines 36-40; June 15, 1870; National Archives image at ancestry.com.
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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: