I think they would be 3rd cousins
Children of sisters are first cousins. Grandchildren of sisters are second cousins. Great grandshildren of sisters are third cousins.
If they are not your daughter's children, then they are all step children. They will be called step-grand children. If they have children, those are step-great grand children. If they are your daughter's children, you must know that they are your grand children as they are directly related to you.
Yes, you are related. you and your grandfather's first cousin's children are second cousins once removed. You and they share an ancestor who is your great great grandparent and their great grand parent
Your her great great aunt!
You are great great aunt to your niece's grandchild. Your children and your niece's grandchild are first cousins, twice removed.
You and the granddaughter of your grandmother's brothers, and sisters, are first cousins.
You are related "by blood" to anyone who is descended from someone you are also descended from. That includes your great grandfather and great grandmother and all their children, grandchildren and great grandchildren.
The relationship is that of a great great great grand uncle and great great great grand niece
If your great great grandmothers were sisters, your common ancestors are your great great great grandparents. That makes you 4th cousins.
40 grand children and 37 great grand children
Chester Arthus' children were:William Lewis Herndon Arthur (dies at age 2)Chester Alan Arthur IIEllen Hansbrough Herndon Arthur
Your grandmother's sister is your great aunt, her grand children are your second cousins twice removed. Genetically speaking this is barely a relationship - but if you were raised together as cousins the familiar bond can be tight.