great-grandparent-in-law
The great-grandparent of one's spouse.
My great-grandparent-in-law is a good person.
great-great-grandparent-in-law
The great-great-grandparent of one's spouse.
My great-great-grandparent-in-law is a good person.
great-great-grandparent-in-law
Spouse's great-great-grandparent.
My great-great-grandparent-in-law is a good person.
grandparent-in-law
A grandparent of one's spouse.
My grandparent-in-law is a good person.