When I was in stage crew at Surry Uni as a child, there were three Graham's in crew at that time. It turned out to be too complicated, trying to discern which Graham one was talking to after a night's rigging, a bottle of loopy juice (4pt jug of Western's Scrumpy Cider), and numerous pints of 1664, so seperate tags were assigned.
Since I wandered around alot with long hair, a denim cutdown jacket, and shouting 'Metal metal metal!!!', I was christened RocKeR. This went on to become my online gaming tag (reduced to RKR as an ingame battle tag). I've been known as this for 20 years.
The other Grahams became Lurch & Psycho, so there were no more Grahams in crew, and everyone was happy!