My root user got renamed

today I found out that my root user got a new name. It is called corybohon now, apparently after this guy: http://corybohon.com

name: corybohon
password: ********
uid: 0
gid: 0
dir: /var/empty
shell: /usr/bin/false
gecos: corybohon

Does anybody have an idea how and why this happened?

I am using Yosemite (OS X 10.10.1) on a MBP (late 2011).