1- Child of their parent’s half-pibling with the other parent’s pibling.
2- Child of their parent’s half-nibling with the other parent’s nibling.
3- Child of their parent’s half-pibling with the other parent’s nibling.
4- Child of their parent’s pibling with the other parent’s half-nibling.
5- Parent's sesqui-first-cousin.
6- Sesqui-first-cousin's child.
My sesqui-first-cousin-once-removed is a good person.
by KOBO8956 September 22, 2021
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Son of their great-grandparent’s full sibling with the other great-grandparent’s full sibling.
My double-first great-cousin-uncle is a good person.
by Hgcloziw November 23, 2019
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double-first-cousin

Double-cousin or double-1C:
1- Child of their parent’s full sibling with the other parent’s full sibling.
2- Person who, in relation to the other person, has zero parents and four grandparents in common.
My double-first-cousin is a good person.
by Gerald128 May 15, 2021
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double-first cousin

Child of a person's maternal aunt (mother’s sister) with that same person's paternal uncle (father’s brother) or child of a person's paternal aunt (father’s sister) with that same person's maternal uncle (mother’s brother).
My double-first cousin is a good person.
by Mr. Jacov November 23, 2019
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double-first-cousin

1- Child of parent’s full sister and of other parent’s full brother at the same time.
2- Child of paternal aunt (father's sister) and of maternal uncle (mother's brother) at the same time.
3- Child of maternal aunt (mother's sister) and of paternal uncle (father's brother) at the same time.
4- Nibling (biological) of mother and of father at the same time.
5- Two parents's nibling.
6- Person who, in relation to the other person, has zero parents and four grandparents in common.
7- Double-cousin.
8- Double-1C.
My double-first-cousin is a good person.
by Peter12369 October 21, 2021
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double-first-cousin

1- Child of uncle (father's brother) and of aunt (mother's sister) at the same time.
2- Child of uncle (mother's brother) and of aunt (father's sister) at the same time.
3- Someone who, in relation to others, has zero parents and four grandparents in common.
by Zabombini October 05, 2024
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4.5-tuple-third-cousin

4.5-tuple-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and nine great-great-grandparents in common.
My 4.5-tuple-third-cousin is a good person.
by Gerald128 May 15, 2021
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