Your nephew's children are your great nephews and great nieces (or grand nephews and grand nieces).
Your nephew's child is your great nephew (if a boy) or your great niece (if a girl). You are that child's great aunt or great uncle.
No, but I think he has a few nephews because one of his brothers has a kid.
Your borther-in-law's children are your nieces and nephews. You are their uncle or aunt, as is your spouse.
Some would call your nephew's children your grand nephews and grand nieces, others would call then your great nephews and great nieces.
If it is a boy then it is your nephew. If it is a girl then it is your niece.
You would be his Great Uncle and he would be your Great Nephew.
They are your great nephews and/or great nieces. Alternately, some people say grand-nephews, grand-nieces.
Your brother's wife's kids would be your nieces or nephews.
Your brother's child's children are your grandnieces or grandnephews.
I know Donnie is on of nine children so I'm guessing he has a quite a few nephews and nieces. I know he has 2 nephews Danny and Jeff from one of his brothers (don't know which one), from his Brother Mark he has 2 nieces and 2 nephews, Ella, Brendan, Micheal and Grace, His sister Tracey has a son named Brandon. He also has another nephew named Adam but I don't know who's kid he is.
I have three nephews.
The plural of nephew is nephews.
Your brother's children would be your nieces and nephews.