Herein I shall, in serial fashion, scatter random thoughts on the level titles of the Lethalist class.
Assassin Level 1--Bravo.
As we all know, bravo is a somewhat pretentious synonym for "hooray!" and its ilk. Webster also reminds us that it means "hired killer; assassin; desperado." Perhaps because of the dual meaning of the word, bravo has connotations of showiness; a guy who goes out of his way to let his badassedness be known in order to enhance his image and, presumably, get more chicks. Sort of the anti-ninja.
A trip over to Wikipedia reveals that bravi was a term for the hired goons of the Dons of northern Italy during the 16th & 17th centuries. Said bravi are featured prominently in the 19th c. novel The Betrothed by Alessandro Manzoni. One more for the reading list.
Side note: Thieves and assassins of 1st level are listed as "Apprentice (rogue)" and "Apprentice (bravo)." Probably this has to do with the guild system which both classes adhere to, but it stands in stark contrast to the paradoxical level title of 1st level fighters: "Veteran"