Your son and your niece are first cousins. Your son and your niece's son are first cousins, once removed. Your grandson, or granddaughter, and your niece's son are second cousins.
depends on if ur neice is your brothers child if so the he would be the grandfather but if u have another brother then he would be its great uncle! ..
your nephew ...
Second cousin
Second Cousin
Your grandfather's niece is a first cousin of one of your parents. Her son is your second cousin.
Your niece's son is your grand-nephew. You are the child's grand aunt, or grand uncle (whichever applies).
Your niece's son's son is her grandson. He is your great great nephew and you are his great great aunt or great great uncle, depending on your gender.
Great-niece.
Nephews and nieces
your 2nd niece...!
Your granddaughters and son have the relationship of nieces and uncle. Your granddaughters being his nieces and your son being their uncle.
Your borther-in-law's children are your nieces and nephews. You are their uncle or aunt, as is your spouse.
They would be great nieces or great nephews.
They are your great nephews and/or great nieces. Alternately, some people say grand-nephews, grand-nieces.
It says what relation are your brothers nieces to you.... It could be your child or your niece also causes you can have two brothers and it may be the other ones kids. Or of course it could be your brother's new wife kid by another man making her no relation.