great-great-great-grandchild
Great-great-grandchild's child.
My great-great-great-grandchild is a good person.
2X-grandchild
Great-grandchild.
My 2X-grandchild is a good person.
9X-grandchild
Great-great-great-great-great-great-great-great-grandchild.
My 9X-grandchild is a good person.
grandchild-in-law
The spouse of one's grandchild.
My grandchild-in-law is a good person.
3X-grandchild
Great-great-grandchild.
My 3X-grandchild is a good person.
great-great-great-great-grandchild
Great-great-great-grandchild's child.
My great-great-great-great-grandchild is a good person.
great-grandchild
Grandchild's child.
My great-grandchild is a good person.