1. The grandchild-in-law of one's sibling.
2. The grandchild of one's spouse's sibling.
My great-nibling-in-law is a good person.
by Elivaldeq November 24, 2019
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1. The child-in-law of one's half-sibling.
2. The child of one's spouse's half-sibling.
My half-nibling-in-law is a good person.
by Elivaldeq November 24, 2019
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