Your mom and her uncle's son are cousins, of the same generation, first cousins.
Your mom's uncle's son is your first cousin, once removed (by one generation). If he has children, they will be your second cousins.
(Children of first cousins are second cousins to each other.)
Your uncle's sons and daughters are your first cousins.
First cousin once removed
Cousin. First cousin to be exact.
2nd cousin more accurately.
cousin
Your cousin in law
your second cousin- in law or by her name lol
Your nephew?
cousin
Your uncle's son is your first cousin.
It means you have (or had) at least two uncles and at least two great-uncles, and that is all it means.
Your uncle/aunt's son/daughter is an adult and you are still small, your uncle/aunt's daughter had a child, and that child will call you uncle. Uncles/aunts are your dad/mom's siblings.
Your uncle's grandchild would be your second cousin because his grown son or daughter would be your first cousin.
your uncles son is your cousin
YOUR MOMS ,dads uncles friend
His great uncle
great uncle