co-nephew-in-law

The son-in-law of one's spouse's sibling.

My co-nephew-in-law is a good person.

co-nephew-in-law

Spouse's niece's husband.

My co-nephew-in-law is a good person.

co-nephew-in-law

Spouse's nibling's husband.

My co-nephew-in-law is a good person.

co-nephew-in-law

Spouse's nibling's husband.

co-nephew-in-law.

double-first cousin-nephew

Son of their maternal first cousin with the paternal first cousin or double-first cousin’s son.

My double-first cousin-nephew is a good person.

half-great-great-nephew

Half-sibling's great-grandson.

My half-great-great-nephew is a good person.

half-great-great-nephew

Half-sibling's great-grandson.

half-great-great-nephew.