Sister. Obvious in the real world, so the question does not arise. The question makes an interesting riddle, though.
Your great grandmother's daughter's daughter (i.e. your great grandmother's granddaughter) is you mother, your aunt, or your first cousin once removed.
Your grandmother's daughter is your mother or your aunt.
Generally yes unless the grandmother provided that should one of her daughters predecease her then that daughter's share would go to her other daughter. You should check with the attorney who is handling the estate.
Her adopted daughter is Lily and her birth daughter is Rose. Rose is named after Harry's grandmother, but I'm not sure who Lily is named after.
Yes, a grandmother is a mother. A mother to her daughter. She is grandmother to her daughter's children.
Your grandmother's sister is your daughter's great great aunt. Your daughter is the great great niece of your grandmother's sister.
My daughter was named after her grandmother and great-grandmother. She has great grandmother's name as her middle name and her grandmother's name is her first.
You should write daughter's if you are talking about one daughter, e.g. "it is my daughter's birthday tomorrow".You should write daughters' if you are talking about more than one daughter at the same time, e.g. "this is our daughters' bedroom, which they share".
A grandmother, a mother, and a daughter with no children.
That would be second cousin once removed. Your parent and your grandmother's sisters daughter were first cousins. You and the daughter's daughter are second cousins. There is a difference on one generation between the two of you.
The correct plural possessive form for "daughter's" is "daughters'."
The plural of daughter-in-law is daughters-in-law.