grandparent-in-law

Spouse's grandparent.

grandparent-in-law.

10X-grandparent

Great-great-great-great-great-great-great-great-great-grandparent.

My 10X-grandparent is a good person.

6X-grandparent

Great-great-great-great-great-grandparent.

My 6X-grandparent is a good person.

9X-grandparent

Great-great-great-great-great-great-great-great-grandparent.

My 9X-grandparent is a good person.

2X-grandparent

Great-grandparent.

My 2X-grandparent is a good person.