Now, at the dawn of time, a schoolboy discovered a magical site of magic, rainbows, presents, deserts, desserts and jellylands, and It was called "Neopets".
He created a profile, played some games, found some things, and adopted a kougra named "Pius(randomnumber)". Then he forgot everything.
A year or more passes, he comes back and can't remember anything about usernames or passwords, just "Pius". As he has become a chemnerd, he adds an -ium and makes a new profile, plays a bit, then drifts away, but the name is still used everywhere.
Afterthought: If Piusium had included an o, as in "Piousium", it would have been meaningful, but not as pretty to look at. Plus, he is Danish, so he doesn't really understand English that well.
Dette var ophavet til mit navn. Now say "rødgrød med fløde".