Your grandmother's sister's grandchildren are your second cousins. They share the same great-grandparents as you but are from a different branch of the family tree. In some cultures, they may also be referred to as "cousins once removed," depending on the specific family lineage.
If your great great grandmothers were sisters, your common ancestors are your great great great grandparents. That makes you 4th cousins.
There is no word in the English language for a relationship between grandmothers of related grandchildren
1st cousin 2x removed
Many grandmothers choose to be called Nana because it is a sweet and endearing term that conveys a sense of closeness and affection. It is a personal choice that reflects their own preferences and the special relationship they want to have with their grandchildren.
Your grandmother's sisters are your Great Aunts.
Your ancestors are the people whose children lead eventually to you. They are your mother and father, grandmothers and grandfathers, great grandparents, great great grandparents, etc. Your cousins are the children, grandchildren, great grandchildren, etc, of the brothers and sisters of your ancestors.
Your grandfathers' sisters' grandchildren are your second cousins.
Yes, along with your grandfathers' sisters, if any.
You are a great-aunt.
third cousins
Sisters, mother, aunts, grandmothers, nieces, cousins, etc.
go ahead if you want to marry your aunt