Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-one great-great-great-grandparents in common.
Irregular-undecuple-fourth-cousin.
by Cerejini May 21, 2024

by Human gonzo August 28, 2021

8.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and seventeen great-great-great-grandparents in common.
My 8.5-tuple-fourth-cousin is a good person.
by ABGR June 9, 2021

Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and four great-great-great-grandparents in common.
Double-fourth-cousin.
by Cerejini May 21, 2024

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

When inbreeding happened sometime in your recent family history and so now you have overlapping cousins (not 2nd cousins)
"Why my families lived in this county for 120 years. There didn't used to be that many people here, and were full red blooded Americans. Do you know what that means?"
"What?"
"I've got some cousin cousins"
"What?"
"I've got some cousin cousins"
by Obamanation2015 July 7, 2016

by 459395 April 3, 2023
