you say call me great aunt not grand aunt
They are your grand-nephews and grand-nieces or great-nephews and great-nieces.
Your nephew's children are your great nephews and great nieces (or grand nephews and grand nieces).
They are your great nephews and/or great nieces. Alternately, some people say grand-nephews, grand-nieces.
Some would call your nephew's children your grand nephews and grand nieces, others would call then your great nephews and great nieces.
You would be their great-granduncle or great grand aunt, and they are your great-great nieces or great-great nephews.
Your nephew's baby would be your grand-nephew or grand-niece. You would be their grand-uncle or grand-aunt.
She would be your Great/ Grand Niece. Seeing as you are her Great Aunt or Uncle.
Your nephew's son is your grand nephew or, some would say, your great nephew. You are his great aunt or great uncle.
There is no special term in the English language to describe a relationship between you and your nephew's wife. To her, you are just "my husband's uncle." If she has children with your nephew, they will be your great nephews and great nieces and you will be their great uncle or great aunt.
you would be the child's great aunty or uncle Therefore, they would be your great niece or nephew.
Your nephew's child is your great niece (if a girl) or your great nephew (if a boy).
They would be your second Uncle/Aunt (or an equivalent relation).AnswerLet's take this apart. Your Mother's sister is your Aunt.Your Aunt's children are your cousins.Your grandmother's sister is your Great Aunt.That means your Great Aunt's children are your second cousins. Theses cousins children will be your third cousins, and so on.I have never heard of second Aunts & Uncles but rather great Aunts & Uncles.