7.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and fifteen great-great-great-grandparents in common.
My 7.5-tuple-fourth-cousin is a good person.
Daughter of their grandparent’s full sibling with the other grandparent’s full sibling.
My double-cousin-aunt is a good person.
Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents and six great-great-grandparents in common.
Triple-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and six great-great-grandparents in common.
My triple-third-cousin is a good person.
Living being that has zero parents, zero grandparents, zero great-grandparents and six great-great-grandparents in common with other living beings.
12.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-five great-great-great-grandparents in common.
My 12.5-tuple-fourth-cousin is a good person.
1- Great-grandparent's second-cousin.
2- Second-cousin's great-grandchild.
My second-cousin-thrice-removed is a good person.