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Your brother's grandchild is your great niece (girl) or great nephew (boy). You are their great aunt (if female) or great uncle (if male) Your brother's grandchild'd (great grandchild) is your great grandniece (girl) or great grandnephew (boy). You are their great-great aunt (if female) or great-great uncle (if male)

  • Your grandchild is your brothers grandnephew.
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14y ago

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