first cousin

Parent's sibling's child.

My first cousin is a good person.

irregular-double-first-cousin

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

Irregular-double-first-cousin.

double-first great-cousin-uncle

Son of their great-grandparent’s full sibling with the other great-grandparent’s full sibling.

My double-first great-cousin-uncle is a good person.

first-cousin-9X-removed

First-cousin-nine-times-removed (1C9R).

My first-cousin-9X-removed is a good person.

sesqui-first cousin-nibling

Sesqui-first cousin’s child.

My sesqui-first cousin-nibling is a good person.

double-first-cousin-once-removed

1- Child of cousin (parent's niece) and of granduncle (other parent's uncle) at the same time.
2- Child of cousin (parent's nephew) and of grandaunt (other parent's aunt) at the same time.
3- Child of cousin (parent's niece) and of other cousin (other parent's nephew) at the same time.
4- Child of grandaunt (grandparent's sister) and of granduncle (other grandparent's brother) at the same time.
5- Parent's double-cousin.
6- Double-cousin's child.

double-first-cousin-once-removed.

double-first-cousin-once-removed

1- Child of cousin (parent's niece) and of granduncle (other parent's uncle) at the same time.
2- Child of cousin (parent's nephew) and of grandaunt (other parent's aunt) at the same time.
3- Child of cousin (parent's niece) and of cousin (other parent's nephew) at the same time.
4- Child of granduncle (grandparent's brother) and of grandaunt (other grandparent's sister) at the same time.

Double-first-cousin-once-removed.