Two reasons
a) because Son of God was an AKA for the Word or Memra of YHVH (God manifest)...see the Targums Jonathan and Onkelos, and
b) because He had no human father
A siblings son is always called a nephew
No, his only son was called Hamnet. He did have a brother called Edmund.
their son is called George (2013)
A Son Called Gabriel was created in 2004-06.
A Son Called Gabriel has 343 pages.
Son-in-law.
Your sister's son, is your nephew.
His son was called Boruto Uzumaki.
Your sister's son is called your nephew. You are his aunt (if you are a woman) or his uncle (if you are a man).
she has a daughter called princess royal and a son called prince charles
No he had one son called edward and 2 daughters called mary and elizabeth
The son of either your sister or your brother is your nephew. The English language does not make a distinction in that.