What is the name for your uncles wifes sisters son?

Answer 1

That would be your cousin, honey. Just keep it simple and call them what they are - family. No need to complicate things with all those fancy terms.

Answer 2

Your uncle would be your sons great uncle. Normally your Son would also call him 'Uncle .... '

Answer 3

Your uncle's wife is your aunt. Her sister is not related to you and neither is the sister's son.

Answer 4

uncle in law