The son of your First Cousin Once Removed, is your First Cousin Twice Removed.
The child of your first cousin, once removed, is your first cousin, twice removed.
The child of your first cousin, once removed, is your first cousin, twice removed, or is your second cousin, depending.
If it is your first cousin, they are your first cousin once removed.
Your first cousin's son is your first cousin, once removed. Your second cousin's son is your second cousin, once removed.
Your first cousin's child is your first cousin once removed.
Your cousin's daughter is called your first cousin, once removed. Although the term "second cousin" is sometimes used for this relationship, it is technically incorrect.
Your first cousin's son is your first cousins once removed. Your second cousin's son is your second cousin, once removed. Your 10th cousin's son is your 10th cousin, once removed. The child of any kind of cousin is that kind of cousin, once removed.
Your first cousin's child is your first cousin, once removed. Your second cousin's child is your second cousin, once removed. Your third cousin's child is your third cousin, once removed. Your relationship to the children of cousins who are once, twice, or more removed is more complex and depends on whether you or the removed cousin are in the older generation.
Your first cousin's daughter is your first cousin, once removed.
If you are first cousins, they would be a first cousin once removed.
You mother's first cousin is your first cousin, once removed.
Your parent's first cousin is your first cousin once-removed . Your parent's second cousin is your second cousin, once removed. And so forth...