The grandchild of your grandmother's first cousin is your third cousin.
The grandchild of your grandmother's second cousin is your fourth cousin.
The grandchild of your grandmother's third cousin is your fifth cousin.
Your grandchild and your sister's grandchild are second cousins.
Your grandchild and the sisters grandchild would be second cousins. The additional generation indicates they would be second cousins once removed.
Second cousins
Second cousins once removed.
Second cousins.
Biologically, the grandchild is a step-grandchild to the grandparent that had no children. In matters of the heart, however, the grandchild is whatever the grandparent feels it is.
Your great uncle's grandchild is your second cousin.
second cousin
If the daughter is biologically related to you, it would be your great-grandchild. If your husband had his daughter before he married you (which would make her your step-daughter), it would be your step-great-grandchild.
Your great grandmother's sister is your great great aunt. Her great grandchild is your third cousin.
He would be his great great great uncle
If the step-dad has or shares custodial authority, he can prevent the child seeing grandparents for any reason.
second cousins twice removed.
Well that would depend on if you were the biological grandfather. If so then the grandchild is also your grandchild. If the child was born to a child of your ex-wife and not fathered by you then they are no relation to you and you would call them by their name.
Your great grandfather's sister is your great great aunt. Her grandchild is your parent's second cousin and your second cousin, once removed.
You and your first cousin's grandson are first cousins, twice removed, to each other.