Brandon Sanderson
Chapter Seventeen - Part Two
Sazed calls Breeze by his real name–Ladrian–for the first time in this chapter, I believe. Breeze doesn't like going by this name. You'll see later that he tries to get people (or, rather, Sazed, who is the only one who uses Breeze's real name) to avoid calling him Ladrian.
The reason is simple. Ladrian is the name that Breeze went by when he was growing up. He's actually the only one on the crew who is a full-blooded nobleman. (More on this in book two.) None of the others know this, of course. He's come to the underground from the opposite direction of everyone else–down from the top. He has let some few people know that his real name is Ladrian (mostly on accident, when he was younger) and the name has stuck.
It's a common enough name in the Final Empire, but someone COULD theoretically connect him to one Lord Ladrian who disappeared from noble society some number of years back. He doesn't, of course, want anyone in the underground to know he's actually a full-blooded nobleman, otherwise he would loose credibility–and maybe even gain the anger of people like Kelsier, who hate the nobility unilaterally.
So, he pretends that he finds the name unsuitable for other reasons, and asks people to just call him Breeze. None of this, of course, gets to come out in the book. Otherwise, I wouldn't have just told it to you. I just don't have the chance to develop Breeze as I would like here. So, those of you reading this can feel vindicated in the fact that you've gotten some true insider information! Breeze will, for those of you who are his fans, get some viewpoints in the next book, which will expand his character somewhat.