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Full or Half Sibling? by Roberta Estes

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  • Full or Half Sibling? by Roberta Estes

    https://dna-explained.com/2019/04/03...half-siblings/

    Hope some of you find this as informative as I do.
    Last edited by Biblioteque; 5th April 2019, 12:10 PM.

  • #2
    Might have use for something like this sooner rather than later. Have a "mystery cousin match" that followed through on being told to test on Ancestry after contacting me on MyHeritage. Reason being that the Ancestry DNA matching list for the family line he was trying to discover connections to is very common on Ancestry, and almost non-existent on MyHeritage.

    Then he comes back as a 711 cm(23 segments) Match to my mother, and and a 923 cm(40 segments) match to her half-sister. Shared common DNA matches also point to matches on both the maternal and paternal line for their common father. So it looks like the predicted first cousin match is related through both of their grandparents somehow.

    Which gets to the next level of fun, among their known siblings and 1st cousins, the youngest among them is now entering their 70's. This guy is in his 40's. (none of my mother's brothers were understood as being present in the area in the right time-frame to be the father. She did have an uncle in the right area, but he died nearly 60 years ago)

    He did have a name for who his father is supposed to be, but doesn't know anything else about him. Problem is, nobody in the family has ever heard of anybody marrying into the family name he mentioned, never mind knowing anybody by his father's reported name.

    Oh but it gets "better" in a bad way, there is a family story out there that sometime "around" 1910, a certain brother took (sexual) advantage of one of his (teen) sisters, and a pregnancy resulted. That illicit daughter was whisked away by the grandparents and nobody knows what became of her. Which currently has us wondering if this guy's father might have been the child of that daughter, and how we're even going to go about trying to help unravel this, as we're not certain that the descendants of the specific lines involved are aware that such a story even exists, or involves them.

    Of course, looking at the level of the match, I'm more inclined to suspect this is a different "anonymous child" that nobody knew anything about, going to be interesting to work through without causing family scandals everywhere in the process.
    Last edited by bartarl260; 16th April 2019, 03:05 AM.

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    • #3
      Well, further investigation is indicating our "DNA Surprise" is a surprise after all. Still waiting on him to respond back to some of our own inquiries though.

      It looks like my grandfather is his grandfather too. We have now identified the person who he named as his probable father, and he appears to have been deceased for about 15 years now. Which will potentially make verification a bit more difficult. Related to that, we know who the mother is(and imagine he knew that much by now as well). We now know when his father was born, and that his grandmother lived next door to my grandfather, and that she was my Grandfather's Niece(by way of his wife of 9 years at the time, my grandmother).

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      • #4
        And where more information is always nice. Two additional data points took suspicion off the grandfather, and moved it onto one of his sons. The only son born to a particular wife. Still gathering more information though, and being frustrated by his surviving children refusing to test because the government is going use the data for nefarious purposes.

        We even found his(the DNA surprise's) alleged father in a GEDCOM file from my grandmother, under a different surname(he was born about a month before his mother married for the first time, it looks like her new husband adopted him. But having lived next door to my grandmother at the time he was born, Grandma recorded the birth name of her grand-nephew, rather than his adopted name. Which is how he evaded our searches earlier.)

        New data points: A Nephew of my grandmother matches the "surprise" at 312cm. He additionally matches my mother's full sister at 560.9cm, compared to the previously known 711cm match for my mother, or the 923cm match to her half-sister. Her matching at just below 561cm pretty much rules out their father being the grandfather for our DNA surprise.

        Given the 312cm match against a cousin to my mother and her (full) sister, we now know "objects may appear closer than they actually are" for them while the half-sister matching him at 923cm is left with a rather limited number of viable options. Which led to investigating the half-sister's maternal line to see if we could correlate any shared matches with her maternal side, so far we have identified 4 such matches. Additionally, her one and only "full" brother(my mother's half-brother) also lived in the area at the time so it would be within his ability to have done so.
        Last edited by bartarl260; 24th April 2019, 12:21 PM.

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