Great-grandparent's first cousin.
My first great-great-cousin-pibling is a good person.
My third great-cousin-pibling is a good person.
1. The sibling of one's stepgrandparent.
2. The stepsibling of one's grandparent.
My step-great-pibling is a good person.
1- Pibling's spouse.
2- Spouse's pibling.
My pibling-in-law is a good person.
1. The spouse of one's parent's sibling.
2. The sibling of one's parent-in-law.
My pibling-in-law is a good person.