Your mother's second cousin is your second cousin once removed.
Your cousin. You are that person's second cousin.
Your mothers sisters Granddaughter is your second cousin
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.
I think they are you cousins once removed
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.
The relation of the mother;s sister to daughter is niece-aunts.
You and the child of your second cousin are second cousins, once removed.
Your second cousin and your son are second cousins, once removed.