co-cousin-nibling-in-law

The grandchild-in-law of one's parent-in-law's sibling.

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

first co-cousin-nibling-in-law

The grandchild-in-law of one's parent-in-law's sibling.

My first co-cousin-nibling-in-law is a good person.