First cousin's great-great-granddaughter.
My first great-great-great-cousin-niece is a good person.
Half-sibling's great-granddaughter.
My half-great-great-niece is a good person.
Half-sibling's great-granddaughter.
half-great-great-niece.
Sesqui-first cousin’s granddaughter.
My sesqui-great-cousin-niece is a good person.
1. The granddaughter of one's parent's stepsibling.
2. The stepgranddaughter of one's parent's sibling.
3. The granddaughter of one's stepparent's sibling.
My step-cousin-niece is a good person.
The daughter-in-law of one's spouse's sibling.
My co-niece-in-law is a good person.