Well, his real name was Béla Ferenc Dezső Blaskó, but he entered this country as Bela Lugosi, probably because he was from a place then known as Lugos, located in present-day Romania. His Ellis Island record is interesting because it shows him arriving in New Orleans and details about his inspection. And now there's a play about this well known immigrant at Ellis Island:
Taking a Chance on America: Bela Lugosi's Ellis Island Story