We're black belt Googlers, but the only explanation we could find to explain the name of this headphone brand is that... well, there doesn't seem to be one.
Perhaps Fanny Wang was a name that appeared in the mists of a particulalry strong spiritual experience for its founders David Adam and Tim Hickman. Or maybe it's just a silly name that was chosen to stand out from the crowd.
Either way they've been praised for their decent sound and tight, heavy bass. And they look good too.