No, we didn't take it from the Bad Brains guitar player. His name is really Gary Miller. Actually, when we finally met each other we both asked how we happened to come across the name and damned near the same time.
For us, it was a variation on the Bond character name Dr. No, and, well, it just stuck around. We were scared (remember we were stupid 21 year old kids) that if we ever became popular Ian Fleming's widow would come after us for using the name, so we changed it to KNOW.