Your sister's daughter's son would be your grandnephew.
Your niece's son is your great nephew.He would be your grandnephew
Grandnephew. He became Caesar's adopted son after the assassination.
They are cousins!!!!!Actually second cousins.
Your nephew's son is your great nephew. Your niece's son is also your great nephew.
Your nephew's son is your grand nephew or, some would say, your great nephew. You are his great aunt or great uncle.
Your grandniece is the granddaughter of your brother or sister, and the daughter of your niece or nephew. Your grandnephew is the grandson of your brother or sister, and the son of your niece or nephew.
Your sister's son is your nephew and you are their aunt or uncle. Their baby would be your great nephew. Some use the term grandnephew, but great is more accurate.
Your son is your uncle's grandnephew. Your uncle is your son's great uncle.
Robert D. Haas is the Chairman of Levi Strauss & Co., son of Walter Haas Jr., and the great-great-grandnephew of the company's founder, Levi Strauss.
his grandnephew Octavius
The grandnephew of Julius Caesar was Octavian, also known as Augustus. He was Caesar's great-nephew and adopted son, who went on to become the first Roman emperor. So, there you have it, Caesar's grandnephew was the one and only Augustus. Hope that clears things up for you!