Username-Anarchy is a commandline tool for the generation of usernames based on the users' real names. This is useful for user account/password brute force guessing and username enumeration when usernames are based on the users’ names. By attempting a few weak passwords across a large set of user accounts, user account lockout thresholds can be avoided. Common aliases (or self-chosen usernames) from forums are also included. Features include a plugin architecture, format string-style username formats, and substitutions. When only a first initial and lastname is known (LinkedIn lists users like this), it will attempt all possible first names, common first and last names from various countries (from Familypedia and PublicProfiler), and an exhaustive list of first and lastnames from Facebook. This also includes usernames scraped from forums, ordered by popularity.