1. The child-in-law of one's parent's sibling.
2. The child of one's parent-in-law's sibling.
My cousin-in-law is a good person.
First cousin's spouse or spouse's first cousin.
My cousin-in-law is a educated person.
The grandson-in-law of one's parent-in-law's sibling.
My first co-cousin-nephew-in-law is a good person.
1- Fourth-cousin's spouse.
2- Spouse's fourth-cousin.
My fourth-cousin-in-law is a good person.
1. The husband of one's grandparent's sibling's daughter.
2. The son of one's grandparent-in-law's sibling.
My first cousin-uncle-in-law is a good person.
Spouse's first-cousin-once-removed's spouse.
My co-first-cousin-once-removed-in-law is a good person.