Embezzler 10 was Proteus prisoner who was down the block from Starbuck ("Bootlegger 137"), at least according to the inebriated Assault 9 (TOS: "The Long Patrol").
Judging by the designation, Embezzler was a descendant of a "parent" who was a con artist or a smuggler.
Notes
- Embezzlement is the fraudulent appropriation by a person to his own use of property or money entrusted to that person's care but owned by someone else.