On the character creation part of the client, When you log onto Illarion will I have to type in Sir Alatris Zeuel to log on? I haven't been in-game yet but I just wanted to know this before-hand.
Sorry to say, but you won't be accepted if you requested a name with "Sir." This is a title and goes against the name rules that can be found on the mainpage.
You just have to enter your character´s name, without any title. In the game, you can change your title anytime by !prefix NEW TITLE and you can also add a suffix by !suffix NEW SUFFIX.