co-cousin-pibling-in-law

The child-in-law of one's grandparent-in-law's sibling.

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

first co-cousin-pibling-in-law

The child-in-law of one's grandparent-in-law's sibling.

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