Brine (have you noticed that if you pronounce it you'll find out it sounds like Brian.) Was Notch's brother. He wasn't really fond of Notch, Notch didn't really like him either. One day, Notch went mining with Brine. While they were mining, Notch said he was sorry to Brine if he ever bothered him. Brine gladly accepted his apology. But Notch didn't want his brother to explore Minecraft anymore, and Brine was already hooked. Notch actually wanted Steve, his friend, to explore Minecraft. So while they were mining, Notch got himself on creator mode and told Brine to follow him. While Brine was mining a diamond block, Notch spawned some mobs and teleported to the surface. He left Brine to die in the mine. But then Brine lost his eyes because of falling into the lava surrounded by the monsters. Brine came back onto the server without any eyes, and it frightened Steve when he was walking with Notch. Notch got angry so he threw Brine into the mine again. For many Minecraft days, Brine sat there, taming the monsters into obeying him. Brine was now known as Herobrine, the hero he was to the monsters. People to this day still believe in him, they wanted to kill him. But even IF they kill Herobrine, he would always come back onto the server and haunt the nights with his monsters.
~Jackalope

This makes so much sense +1