double-third-cousin

Double-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and four great-great-grandparents in common.

My double-third-cousin is a good person.

double-third-cousin

Living being that has zero parents, zero grandparents, zero great-grandparents and four great-great-grandparents in common with other living beings.

double-third-cousin.

step-third-cousin

1- Step-great-grandpibling's great-grandchild.
2- Great-grandpibling's step-great-grandchild.
3- Step-3C.

My step-third-cousin is a good person.

third-cousin-9X-removed

Third-cousin-nine-times-removed (3C9R).

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

7.5-tuple-third-cousin

7.5-tuple-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and fifteen great-great-grandparents in common.

My 7.5-tuple-third-cousin is a good person.

third cousin-nephew

Third cousin's son.

My third cousin-nephew is a good person.

sesquiple-third-cousin

Sesquiple-3C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and three great-great-grandparents in common.

My sesquiple-third-cousin is a good person.