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DNA Connections
It may be possible to confirm family relationships with Willem Johannes 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 Willem Johannes:
Jordaan-1483 and Jordaan-904 appear to represent the same person because: Clear duplicates. Jordaan-904 already existed. I'll do the final integration of the bio after the merge, thanks!