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Possible half uncle

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  • Possible half uncle

    Not sure where to post this about Family Finder results. I have a 1st to 2nd cousin dna match sharing 645 centimorgans (cm) and 33 longest blocks. We confirmed that he is on my maternal side. My mother has a brother and they are the only known children of my maternal grandfather. My uncle has a daughter but he does not have any sons. This match does not seem to be a first cousin but yet his longest blocks appear to be in the same range as my paternal first cousins except his cm are a little lower than their cm. This match is totally unknown to our family. Question: are his CMs in the right range to be a maternal half uncle? Is it possible for 1st to 2nd cousin be a half uncle? Thanks

  • #2

    Yes, it could be a half uncle according to Bettinger's chart.