Niece...
Your niece's child is your great niece if she is a girl, or your great nephew if he is a boy.
Your niece and your child are first cousins. Your niece's child and your child are first cousins, once removed. The children of your niece's child and of your child are second cousins to each other.
The child of your niece is your great nephew (if the child is a boy) or your great niece( if the child is a girl). You are the child's great aunt, because you are a woman. A man would be the child's great uncle.
Your child and your niece are first cousins to each other. Your child and your niece's child are first cousins, once removed.
You are Great Aunt to your niece's child. The child is your great niece or great nephew.
yes... a niece is a girl and a nephew is a boy
Your niece's child is your grand-niece or grand-nephew, and they would be a cousin to your children.
You can call them their real name...or...niece
Generally the niece, unless the step child was legally adopted.Generally the niece, unless the step child was legally adopted.Generally the niece, unless the step child was legally adopted.Generally the niece, unless the step child was legally adopted.
Niece if it's a female, and nephew if it's a male.
Great niece's baby is your great-great niece or great-great nephew.The system works like this:Your niece's child is your great niece/nephewYour great niece's child is your great great niece/nephewYour great great niece's child is your great great great niece/nephewYour great great great niece's child is your great great great great niece/nephew...