In BeOS, baron is the user who owns all of your files, unless you change the user's name. (BeOS is single-user right now, so you have to do this manually)

All you have to do is open /boot/home/config/boot/UserSetupEnvironment and add the line:
export USER=username

You can also change the group name, with a line reading:
export GROUP=lusers (or whatever group name you want)

Then either reboot or source UserSetupEnvironment, and you're done.

baron was named after Baron Arnold, a Be engineer who was given the files as a birthday present by the author of the BFS filesystem, Dominic Giampolo.

(source: The BeOS Bible)