Great-great-grandparent's sibling's great-great-grandchild.
by Mr. Jacov November 23, 2019

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

Sesquaple-2C: Person who, in relation to the other person, has zero parents, zero grandparents and seven great-grandparents in common.
My sesquaple-second-cousin is a good person.
by ZYRB3256 February 21, 2022

The grandchild-in-law of one's parent-in-law's sibling.
by Elivaldeq November 24, 2019

Living being that has zero parents, zero grandparents, zero great-grandparents and five great-great-grandparents in common with other living beings.
irregular-triple-third-cousin.
by Simaduria July 26, 2024

1- Half-pibling's child / Parent's half-nibling.
2- Person who, in relation to the other person, has zero parents and one grandparent in common.
3- Half-first-cousin.
4- Half-1C.
2- Person who, in relation to the other person, has zero parents and one grandparent in common.
3- Half-first-cousin.
4- Half-1C.
My half-cousin is a good person.
by Peter12369 October 21, 2021

Fourth-cousin-seven-times-removed (4C7R).
My fourth-cousin-7X-removed is a good person.
by N8953SW June 26, 2021
