Well, as for my name, it has its own history, but I'd gladly tell you its origin. Some years ago, I was trying to create an account in Pokémon Deluge (or what it's called now, DelugeRPG). I didn't know what to call myself, but then the first word that popped out of my head was Student. And then, I just inserted the initial letter of my first name. Originally, it was supposed to be just Student D, but it says that someone already got it or it's too common (?), so it the website recommended that my name should be Student D1. Upon reading my name aloud, I liked the sound of it; and that is how my named was formed.
Anyways, back to the guessing, it's near Thailand and near Indonesia, your location.