Blizzard, the American computer games development company, started life as Silicon & Synapse but customer confusion and misspelling of the name caused co-founders Michael Morhaime, Frank Pearce and Allen Adham to have a rethink.
They wanted to rebrand as Chaos Studios, a name that Adham said "was pretty representative of our development process", but the name was already taken so they opted for Ogre Studios instead. However the company president Jan Davidson didn't like the name so they flicked through a dictionary to find an alternative:
"We only found Blizzard because Jan said she didn't like Ogre, and so Allen started going through the dictionary," Morhaime said. "Allen started going through and writing down cool names, in alphabetical order. I don't know how far he got. At least to B (...) Once we found Blizzard, we said that's it, that's the one… And Blizzard came up pretty clean, back then. Now it wouldn't, now it's ours!"
Sources How Blizzard got its name | Oxford English Dictionary.