Your sister's daughter is your niece.
Your sister's granddaughter is your great niece
Your sister's granddaughter's daughter (your sister's great granddaughter) is your great great niece. You are her great great aunt, if you are a woman, or her great great uncle, if you are a man.
Your sisters daygter is your neice!
Great Granddaughter
Your daughter and your sister's child are first cousins. Your daughter and your sister's grandchild are first cousins, once removed.
You are not related. Your granddaughter is by marriage.
Your sister is great aunt to your daughter's child. The child is your sisters great nephew (if a boy) or great niece (if a girl).
The relation of the mother;s sister to daughter is niece-aunts.
Some exact nouns for two children are sisters, brothers, brother and sister, cousins, sons, daughters, son and daughter, grandchildren, grandsons, granddaughters, etc.
Yes she has a daughter named Grace Penner!
Yes, you would be the step-nan (or step-grandmother) to your granddaughter's step-brothers.
I am going to be my granddaugher's sponsor for confirmation and I would like to give her the bracelet as a gift. ( the script reading --granddaughter instead of daughter)
If she is your sisters daughter then she is your neice :)
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.