Spouse's great-grandpibling's spouse.
My co-great-grandpibling-in-law is a good person.
Sibling's great-great-grandchild.
My great-great-grandnibling is a good person.
Sibling's great-great-grandchild.
I have 212 great-great-grandniblings (106 great-great-grandnieces and 106 great-great-grandnephews).
Sibling's great-great-grandchild.
great-great-grandnibling.
First cousin's great-great-granddaughter.
My first great-great-great-cousin-niece is a good person.