The children of your great grandfather's brother are your grandparent's first cousins, and your first cousins twice removed.
Your grandfather's sister's children are your 'first cousins once removed'.
The children of your grandfather's brother are your first cousins, once removed. You can also call them by their names.
Yes, you and the daughter of your great grandfather share a common ancestor in your great great grandparent. A shared ancestor makes you related. The daughter of your great grandfather's brother is your grandfather's (or grandmother's) first cousin. Therefore she is your first cousin, twice removed.
Some of your great grandpa's children are your grandparents. Their grandchildren are you, your siblings, and your cousins. Your great grandpa's other children are your grandparent's brothers and sisters (your great aunts and great uncles.) Their grandchildren are your first and second cousins.
If the grandfathers were 1st cousins, the grandchildren of each grandfather are 3rd cousins to each other.
Third cousins once removed.
If your first common ancestor is your great great grandfather and her great grandfather, then the two of you are second cousins, once removed.She and one of your parents are second cousins to each other.Her children are your third cousins.
If you are referring to YOUR grandmother and grandfather then your children are their great grandchildren. If you are referring to your parents, then your children are their grandchildren. The primary kinship dominates.
Yes , if the daughter has a sister or brother with a child then the 2 children are first cousins.
If two people have the same grandfather, they are siblings or first cousins. If two people have the same great grandfather, they are siblings, first cousins, or second cousins to each other. If two people have the same great great grandfather, they are siblings, first cousins, second cousins, or third cousins.
All the children of your aunt and uncle are your first cousins. You and your siblings are their first cousins, because you are the children of their aunt or uncle.Your first cousins children are your first cousins, once removed. Your children are first cousins, once removed, to your first cousins.Your children and your first cousin's children are second cousins to each other.