You're cousins. Specifically, you're first cousins, five times removed. Most genealogy programs will figure out relationships like this for you.
no problem man! enjoy
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
you will be his great great grand son/daughter..:)
Your great grandmother's brother is your great great uncle. Your parent and the grandson of your great great uncle are Second Cousins. Therefore you and the grandson of your great great uncle are Second Cousins, once removed.
If you have no siblings but your daughter has an uncle, he is the brother of your spouse, your brother-in-law.
You are each others cousins.
The son of your great niece is your great great nephew.
They are second cousins
Your uncle would be your sons great uncle. Normally your Son would also call him 'Uncle .... '
Your niece's son is your great nephew. You are his great aunt or great uncle.
The son of your grandson is your great grandson. You are his great grandmother or great grandfather.