Your nephew's daughter is your great niece. You are her great aunt (if you are a woman) or her great uncle (if you are a man).
Great Aunt or Great Uncle
Great niece
Your daughter is you great nephews great cousin if u live in Australia ,USA ,UK
Your brother's children would be your nieces and nephews.
Your sister's husband is your children's uncle. They are his nieces and nephews.
Your daughter and your nephew are first cousins. His daughter is your daughter's first cousin, once removed.
Great nephew
Nephews are the sons of your brother or sister. Therefore nephews who are not brothers to each other are first cousins to each other.
Your daughter's step-sister would be your step-daughter.
Your aunt's daughter is your first cousin.
Grandaughter.
neice
I think one of Abrams nephews name is Isaac.
daughter-in-law