third-cousin-once-removed 

1- Parent's third-cousin.
2- Third-cousin's child.

third-cousin-once-removed.

third-cousin-once-removed by Simaduria July 26, 2024

third-cousin-twice-removed

1- Grandparent's third-cousin.
2- Third-cousin's grandchild.

third-cousin-twice-removed.

third-cousin-twice-removed by Simaduria July 26, 2024

third cousin twice removed

1. Grandparent's third cousin
2. Third cousin's grandchild

my third cousin twice removed is a politician

third cousin twice removed by GasparThalasso June 6, 2025

third cousin thrice removed

1. Great-grandparent's third cousin
2. Third cousin's great grandchild

I don't know my third cousin thrice removed

third cousin thrice removed by GasparThalasso June 21, 2025

quintuple-third-cousin 

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

My quintuple-third-cousin is a good person.

quintuple-third-cousin by Gerald128 May 15, 2021

half-third-cousin 

Half-3C:
1- Parent's half-second-cousin's child.
2- Grandparent's half-first-cousin's grandchild.
3- Great-grandparent's half-sibling's great-grandchild.
4- Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common.

My half-third-cousin is a good person.

half-third-cousin by Gerald128 May 17, 2021

co-third-cousin-in-law

Spouse's third-cousin's spouse.

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

co-third-cousin-in-law by JAMP12 September 21, 2021