3C:
1- Parent's second-cousin's child.
2- Grandparent's first-cousin's grandchild.
3- Great-grandparent's full sibling's great-grandchild.
4- Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and two great-great-grandparents in common.
1- Parent's second-cousin's child.
2- Grandparent's first-cousin's grandchild.
3- Great-grandparent's full sibling's great-grandchild.
4- Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and two great-great-grandparents in common.
My third-cousin is a good person.
by Gerald128 May 15, 2021
Get the third-cousinmug. My second-cousin-3X-removed is a good person.
by N8953SW June 26, 2021
Get the second-cousin-3X-removedmug. by Quagmiremom March 31, 2023
Get the cousin hoppermug. Sesqua-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and seven great-great-great-grandparents in common.
My sesqua-fourth-cousin is a good person.
by ABGR June 9, 2021
Get the sesqua-fourth-cousinmug. Parent's fourth cousin.
by Hgcloziw November 23, 2019
Get the fourth cousin-piblingmug. Quintuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and ten great-great-great-grandparents in common.
My quintuple-fourth-cousin is a good person.
by ABGR June 9, 2021
Get the quintuple-fourth-cousinmug. 
Get the great-cousin-niblingmug.