nibling-in-law 

1. The child-in-law of one's sibling.
2. The child of one's spouse's sibling.

My nibling-in-law is a good person.

nibling-in-law by Elivaldeq November 24, 2019

co-niece-in-law 

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

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

co-niece-in-law by Elivaldeq November 24, 2019

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 by Elivaldeq November 24, 2019

co-nibling-in-law 

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

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

co-nibling-in-law by Elivaldeq November 24, 2019

cousin-in-law 

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.

cousin-in-law by Elivaldeq November 24, 2019

first cousin-in-law 

1. The child-in-law of one's parent's sibling.
2. The child of one's parent-in-law's sibling.

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

first cousin-in-law by Elivaldeq November 24, 2019

co-cousin-in-law 

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

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

co-cousin-in-law by Elivaldeq November 24, 2019