Third-cousin-nine-times-removed (3C9R).
My third-cousin-9X-removed is a good person.
by N8953SW June 27, 2021
My third cousin-nephew is a good person.
by Hgcloziw November 23, 2019
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.
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
My third-cousin-once-removed-in-law is a good person.
by JAMP12 September 21, 2021
My third great-cousin-aunt is a good person.
by Gtopql November 24, 2019