"Root" as a name has a long literary history:
Root is a root is a root is a root. - Gertrude Stein A root by any other name would smell as sweet. - Wm. Shakespeare
Aren't you being a bit extreme in critiziing his nom de plume? I have a
president that calls himself "W" and that doesn't bother me a bit (although it
does bother me that he calls himself "President" and that other people do too).