The relationship between two second cousins is that they are second cousins. That means that one of the parents of one was the first cousin of one of the parents of the other; and that one grandparent of one was the sibling of the grandparent of the other.
Your child is your cousin's second cousin. (And he/she is your child's second cousin)
Second cousin
The child of your second cousin is your second cousin, once removed.
Your mother's second cousin is your second cousin once removed.
Your cousin. You are that person's second cousin.
It's your second cousin (:
second cousin
Your first cousin's second cousin may be your second cousin as well, or may not be related to you at all.
You and the child of your second cousin are second cousins, once removed.
Your second cousin and your son are second cousins, once removed.
It would be a second cousin.
It is your cousin, i think.