Your sister's son is your nephew. Your uncle is your nephew's grand uncle or great uncle.
The son of your uncle is your first cousin.
The son of your great uncle is your parent's first cousin and your first cousin, once removed.
Your uncle's son is your first cousin.
your cousin
Uncle or Auntie.
Your uncle would be your sons great uncle. Normally your Son would also call him 'Uncle .... '
Your sister's son is your nephew and you are his aunt (if you are female) or his uncle (if you are male.
We would infact, cll our sisters son your nephew and they would call you either auntie or uncle depending on your sex.
If you have no siblings but your daughter has an uncle, he is the brother of your spouse, your brother-in-law.
You would be his Great Uncle or Great Aunt He in turn would be your Great Nephew.
Wat the heck in this question yaar? its maternal uncle. you are uncle your son is first cousin to your sisters his aunt sons or daugters a : a child of one's uncle or aunt b : a relative descended from one's grandparent or more remote ancestor by two or more steps are cousins and when those sons and daughters have kids they become second cousins etc.
The son of your Uncle's son is your uncle's grandson. Your uncle's grandson is your first cousin, once removed.
Your son is your uncle's grandnephew. Your uncle is your son's great uncle.
Your Uncle's son is your first cousin.
Your Uncle's son is your first cousin.
Your uncle's son is your (first) cousin.