second cousins or first cousins once removed
Your daughter and your nephew are first cousins to each other. Your daughter and your nephew's son are first cousins, once removed, to each other.
Your baby and your cousins are first cousins once removed to each other. You baby and your second cousins are second cousins once removed to each other.
Your niece and your son or daughter are first cousins. That would make your niece and your grandchild first cousins once removed. Your niece's child and your grandchild are second cousins.
Your first cousins are the children of your aunts and uncles. You all share the same grandparents, but not closer relatives. Your children and the children of your first cousins are second cousins to each other. They all share the same great grandparents, but not closer relatives. Your grandchildren and the grandchildren of your first cousins are third cousins to each other. They all share the same great great grandparents, but not closer relatives. You and the children of your first cousins are first cousins, once removed, to each other. Toy and the children of your second cousins are second cousins, once removed, to each other. Your and the children of your third cousins are third cousins, once removed, to each other.
You and your uncle's child are first cousins to each other. You and your uncle's grandchild are first cousins, once removed, to each other.
You and your first cousin's daughter are first cousin, once removed, to each other. Your child and your first cousin's child are second cousins to each other.
You are first cousins once removed to each other.
You and your first cousin's daughter are first cousin, once removed, to each other. Your child and your first cousin's child are second cousins to each other.
Your first cousin and your child are first cousins, once removed, to each other. Your second cousins and your child are second cousins, once removed, to each other.
You and the children of your first cousin are first cousins, once removed, to each other. Your children and the children of your first cousin are second cousins to each other.
Your children and your first cousin are first cousins, once removed, to each other. Your children and your first cousin's children are second cousins to each other.