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.
Pibling-in-law (only pibling's spouse).
My pibling-by-marriage is a good person.
Great-grandparent's second cousin.
My second great-great-cousin-pibling is a good person.
Great-grandparent's first cousin.
My first great-great-cousin-pibling is a good person.