Cousin squared

Auntie Alpha and Uncle 1 have child ABC

ABC is your cousin
123 is the opposite family cousin

You have no direct relation to 123 beside being your cousin cousin
123 is a cousin squared

What do you call your cousin's cousin?

Cousin squared

Cousin squared

Auntie Alpha and Uncle 1 have children A,B,C

A,B,C are your cousins
1,2,3 are their opposite family cousins

You have no direct relation to 1,2,3 beside being your cousins' cousins
1,2,3 are cousins squared (cousin²)

The non-related cousin of my cousin is my cousin squared

double-first-cousin

1- Child of parent’s full sister and of other parent’s full brother at the same time.
2- Child of paternal aunt (father's sister) and of maternal uncle (mother's brother) at the same time.
3- Child of maternal aunt (mother's sister) and of paternal uncle (father's brother) at the same time.
4- Nibling (biological) of mother and of father at the same time.
5- Two parents's nibling.
6- Person who, in relation to the other person, has zero parents and four grandparents in common.
7- Double-cousin.
8- Double-1C.

My double-first-cousin is a good person.

double-first-cousin

1- Child of uncle (father's brother) and of aunt (mother's sister) at the same time.
2- Child of uncle (mother's brother) and of aunt (father's sister) at the same time.
3- Someone who, in relation to others, has zero parents and four grandparents in common.

Double-first-cousin.

double-first-cousin

Double-cousin or double-1C:
1- Child of their parent’s full sibling with the other parent’s full sibling.
2- Person who, in relation to the other person, has zero parents and four grandparents in common.

My double-first-cousin is a good person.

double-first cousin

Child of a person's maternal aunt (mother’s sister) with that same person's paternal uncle (father’s brother) or child of a person's paternal aunt (father’s sister) with that same person's maternal uncle (mother’s brother).

My double-first cousin is a good person.

4.5-tuple-third-cousin

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.

My 4.5-tuple-third-cousin is a good person.