octuple-third-cousin 

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.

My octuple-third-cousin is a good person.

octuple-third-cousin by Gerald128 May 15, 2021

sesqui-third-cousin 

Sesqui-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and three great-great-grandparents in common.

My sesqui-third-cousin is a good person.

sesqui-third-cousin by Gerald128 May 17, 2021

double-third-cousin

Double-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and four great-great-grandparents in common.

My double-third-cousin is a good person.

double-third-cousin by Gerald128 May 17, 2021

step-third-cousin 

1- Step-great-grandpibling's great-grandchild.
2- Great-grandpibling's step-great-grandchild.
3- Step-3C.

My step-third-cousin is a good person.

step-third-cousin by User655 July 25, 2021

co-third-cousin-in-law

1- Spouse's third-cousin's spouse.
2- Co-3C-in-law.

My co-third-cousin-in-law is a good person.

co-third-cousin-in-law by User655 July 25, 2021

sesquiple-third-cousin 

Sesquiple-3C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and three great-great-grandparents in common.

My sesquiple-third-cousin is a good person.

sesquiple-third-cousin by ZYRB3256 February 21, 2022

sesterple-third-cousin

Sesterple-3C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and five great-great-grandparents in common.

My sesterple-third-cousin is a good person.

sesterple-third-cousin by ZYRB3256 February 21, 2022