fourth cousin-niece

Fourth cousin's daughter.

My fourth cousin-niece is a good girl.

sesqui-fourth-cousin

Sesqui-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and three great-great-great-grandparents in common.

My sesqui-fourth-cousin is a good person.

co-fourth-cousin-in-law

Spouse's fourth-cousin's spouse.

My co-fourth-cousin-in-law is a good person.

fourth cousin-pibling

Parent's fourth cousin.

My fourth cousin-pibling is a good person.

tredecuple-fourth-cousin

Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-six great-great-great-grandparents in common.

Tredecuple-fourth-cousin.

tredecuple-fourth-cousin

Tredecuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-six great-great-great-grandparents in common.

My tredecuple-fourth-cousin is a good person.

fourth-cousin-1X-removed

Fourth-cousin-once-removed (4C1R).

My fourth-cousin-1X-removed is a good person.