Birth: "Births, Deaths and Marriages search,” NSW Registry of Births, Deaths and Marriages (https://familyhistory.bdm.nsw.gov.au/ : accessed 31 May 2023), birth entry for John R Brennan, registration number 31810/1912, father John A, mother Teresa A, district Murrumburrah.
Death: "Births, Deaths and Marriages search,” NSW Registry of Births, Deaths and Marriages (https://familyhistory.bdm.nsw.gov.au/ : accessed 31 May 2023), death entry for John R Brennan, registration number 11531/1912, father John A, mother Teresa A, district Murrumburrah.
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DNA Connections
It may be possible to confirm family relationships with John 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 some percentage of DNA with John: