1. The son-in-law of one's sibling.
2. The son of one's spouse's sibling.
My nephew-in-law is a good person.
1- Nibling's husband.
2- Spouse's nephew.
My nephew-in-law is a good person.
1. The grandson-in-law of one's sibling.
2. The grandson of one's spouse's sibling.
My great-nephew-in-law is a good person.
My nephew-by-marriage-in-law is a good person.