The son of a count is typically referred to as a "viscount" or "baron," depending on the specific titles and hierarchy of nobility in a given country. In some cases, he may also simply be called "the heir" if he is in line to inherit his father's title. The exact terminology can vary based on the country's aristocratic structure.
Your son will be a nephew to your brother, and will call him "Uncle".
You do you call your sons's son your "grandson" !
No, Mercedes Mondego does not have a son in "The Count of Monte Cristo" book. She has a son with Edmond Dantes (the Count of Monte Cristo) in some adaptations, but not in the original novel by Alexandre Dumas.
You would call the son of a lord, John, son of Lord So-and-So
No. There is speculation that her son Louis Charles (Louis XVII) was the son of Count Axel Von Feursten though.
I'd normally call him by his first name. And the son of your aunt is your first cousin.
His name.
Your sister's son will call you his uncle, if you are a man, or his aunt, if you are a woman.
your co son.
It is call count off.
If your sister had a son, then he is your nephew.
You would call your daughter's son by his name ex: Hi Jack.