third great-cousin-nephew

Third cousin's grandson.

My third great-cousin-nephew is a good person.

half-third-cousin

1- Half-great-grandpibling's great-grandchild.
2- Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common.

Half-third-cousin.

half-third-cousin

1- Half-great-grandpibling's great-grandchild.
2- Living being that has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common with other living beings.

Half-third-cousin.

third-cousin-5X-removed

Third-cousin-five-times-removed (3C5R).

My third-cousin-5X-removed is a good person.

sester-third-cousin

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

My sester-third-cousin is a good person.

third cousin-niece

Third cousin's daughter.

My third cousin-niece is a good girl.

sesquaple-third-cousin

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

My sesquaple-third-cousin is a good person.