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.

double-first cousin-niece

Daughter of their maternal first cousin with the paternal first cousin or double-first cousin’s daughter.

My double-first cousin-niece is a good person.

first great-cousin-nephew

First cousin's grandson.

My first great-cousin-nephew is a good boy.

first cousin-pibling

Parent's first cousin.

My first cousin-pibling is a good person.