1. The spouse of one's grandparent's sibling's child.
2. The child of one's grandparent-in-law's sibling.
My first cousin-pibling-in-law is a good person.
Spouse's half-pibling's spouse.
half-co-pibling-in-law.
My pibling-by-marriage-in-law is a good person.
1. The spouse of one's grandparent's sibling.
2. The sibling of one's grandparent-in-law.
My great-pibling-in-law is a good person.
1. The spouse of one's grandparent's sibling's child.
2. The child of one's grandparent-in-law's sibling.
My cousin-pibling-in-law is a good person.
The child-in-law of one's grandparent-in-law's sibling.
My first co-cousin-pibling-in-law is a good person.