The Latin form of the Greek name Alexandros, meaning “defending men.” You can use this in 18 years to bolster your case for why he should go to law school instead of live in your basement.
Alex, Alec, Al, Lex, Sandy, Xander (or Zander if you prefer to throw a random “z” in there).
Famous people named Alexander:
Inventor Alexander Graham Bell; sculptor Alexander Calder; actors Alec Baldwin, Alex Linz, and Alexander Ludwig.
A “Brandy Alexander” is a popular drink blended from cognac, creme de cacao, and heavy cream. Strong and sweet, just like your little Alexander, who may also be the reason you need to mix yourself a drink in the first place.