First cousin's great-great-granddaughter.
My great-great-great-cousin-niece is a good person.
A joe mama or a idiotic headless asylum.
WHY ARE YOU BEING SO Burnt Niece 007 OMG (Means the word is being burnt)
Daughter of their maternal first cousin with the paternal first cousin or double-first cousin’s daughter.
My double-cousin-niece is a good person.
1. The granddaughter-in-law of one's sibling.
2. The granddaughter of one's spouse's sibling.
My great-niece-in-law is a good person.