The great-great-grandmother of one's spouse.
My great-great-grandmother-in-law is a good person.
1- Stepgrandparent's mother.
2- Grandparent's stepmother.
My step-great-grandmother is a good person.
1. The grandmother of one's stepmother or stepfather.
2.The stepmother of one's grandmother or grandfather.
3.The mother of one's grandmother's husband or grandfather's wife; but not their biological great-grandmother.
His Step Great-Grandmother was the wife of his Great-Grandfather.
1- Stepgrandparent's mother.
2- Grandparent's stepmother.
step-great-grandmother.
Spouse's great-great-great-grandmother.
My great-great-great-grandmother-in-law is a good person.
Great-great-great-grandparent's mother.
My great-great-great-great-grandmother is a good person.
Great-great-great-grandparent's mother.
great-great-great-great-grandmother