Child of their maternal first cousin with the paternal first cousin or double-first cousin’s child.
My double-cousin-nibling is a good person.
Child of their maternal first cousin with the paternal first cousin or double-first cousin’s child.
My double-first cousin-nibling is a good person.
Daughter of their maternal first cousin’s child with the paternal first cousin’s child or double-first cousin’s granddaughter.
My double-great-cousin-niece is a good person.
Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and four great-great-great-grandparents in common.
Double-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and four great-great-great-grandparents in common.
My double-fourth-cousin is a good person.
Daughter of their grandparent’s full sibling with the other grandparent’s full sibling.
My double-first cousin-aunt is a good person.
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.