Great grandmother is a correct way to punctuate the way of genealogically identifying the grandmother of one's father or mother. This is due to a current tendency not to be heavy-handed in the use of dashes and hyphens, which traditionally are more costly in type-setting. The form great-grandmother nevertheless will be found too.
You add another "great" for each generation back in history. So the mother of your great great great grandmother is your great great great great grandmother.
You grandmother's father is your great grandfather and his wife (your grandmother's mother) is your great grandmother.
Your great grandmother's sister is your great-great-aunt.
The English language does not include a relationship called "great mother." It has terms "grandmother" (the mother of your father or of your mother) and great grandmother (the mother of one of your grandparents. The sister of your grandmother is your great aunt. The sister of your great grandmother is your great great aunt.
Great grandmother is a correct way to punctuate the way of genealogically identifying the grandmother of one's father or mother. This is due to a current tendency not to be heavy-handed in the use of dashes and hyphens, which traditionally are more costly in type-setting. The form great-grandmother nevertheless will be found too.
If you're using the phrase as an adjective (example "This easy-to-use remote is great!") then it will definitely need the hyphens. Otherwise, the hyphens are incorrect.
Your grandmother's grandmother is your great-great-grandmother.
Your great grandmother's mother is your great great grandmother.
Tatarabuela Grandmother: abuela Great grandmother: bisabuela Great great grandmother: tatarabuela
Your father's grandmother is typically referred to as your great-grandmother.
You add another "great" for each generation back in history. So the mother of your great great great grandmother is your great great great great grandmother.
your great great grandmother.
Your great grandmother's brother is your great great uncle.
You grandmother's father is your great grandfather and his wife (your grandmother's mother) is your great grandmother.
Ruth was the great grandmother of King David.
Your great grandmother's sister is your great-great-aunt.