Your nephew and your daughter are first cousins to each other.Your nephew's son and your daughter are first cousins, once removed, to each other.
Your daughter and your sister's son are first cousins to each other. Your sister's son's daughter (her granddaughter) and your daughter are first cousins, once removed.
Your son and your great nephew (brother's daughter's son) are first cousins, once removed (i.e there is one generation separating them in the family tree) .
Your sister's daughter and your son are first cousins to each other.
He is your first cousin twice removed.
Your sister's son and your daughter are first cousins to each other.
Your nephew and your daughter are first cousins to each other.Your nephew's son and your daughter are first cousins, once removed, to each other.
Your nephew and your daughter are first cousins to each other. Your nephew's son and your daughter are first cousins, once removed. Your nephew's son and your daughter's child would be second cousins to each other.
Your daughter and your niece are first cousins. Your daughter than your niece's son are first cousin's once removed. Your daughter's child and your niece's child are second cousins to each other.
second-cousin
Your daughter and your sister's son are first cousins to each other. Your sister's son's daughter (her granddaughter) and your daughter are first cousins, once removed.
I think the kids would be second cousins
Your half-brother's daughter is your niece. Your niece and your son are first cousins to each other.
Your children and the children of your first cousin are second cousins to each other.
Your daughter and your first cousin's son are second cousins to each other.
Your son and your niece are first cousins. Her daughter and your son are first cousins, once removed.
Your son and your great nephew (brother's daughter's son) are first cousins, once removed (i.e there is one generation separating them in the family tree) .