argentinean or argentine

[Hedonist]

What is the proper demonym for Argentina? Argentine, Argentinean or Argentinian? I hear all of these. I guess there is more than one correct way of referring to a person from Argentina.

Could it be AmE / BrE difference?

Or can it be that one is a noun, and the other adjective? e.g.
He is Spanish [adjective]. He is a Spaniard [noun].

Many thanks!

[Kitosdad]

Argentinean is what I would use.
_________________
Keep it simple ... Keep it interesting.