Thief

A Thief is a person who steals other peoples property.A professional Thief is also called a Burglar.

But in a more common sense Thief may also refer to a Looter, Robber, Brigand, Charlatan, Swindler, Smuggler, Pirate etc.

Thieves of Renown

 * Bilbo Baggins

Roleplaying
In Rolemaster, Thief is a playable profession.