great-great-grandnibling-in-law

1- Great-great-grandnibling's spouse.
2- Spouse's great-great-grandnibling.

My great-great-grandnibling-in-law is a good person.

co-great-great-grandnibling-in-law

Spouse's great-great-grandnibling's spouse.

My co-great-great-grandnibling-in-law is a good person.