Dr. Octagon is one of Kool Keith's many alter egos. His initial release as Dr. Octagon was 1996's Dr. Octagonecologyst, on which he collaborated with Dan the Automator Nakamura and DJ QBert. After the name was dropped in favour of Dr. Dooom, it was widely believed that it wouldn't be used again until the release of 2006's The Return of Dr. Octagon, which Keith maintains was changed and released without his consent.
Parliament was originally The Parliaments, a doo-wop group based out of George Clinton's Plainfield, New Jersey barber shop. The name was soon abandoned due to legal issues with Revilot and Atlantic Records, and most of the same people recorded under the name Funkadelic, which consisted of The Parliaments' backing musicians. Billy "Bass" Nelson is credited with creating the name Funkadelic. He also switched from 6-string guitar to bass, creating room for his childhood friend Eddie Hazel to join the group.
Deltron 3030 is a USA hip-hop supergroup, formed in 1999, around a core of: producer Dan Nakamura (aka Dan the Automator and the cantankerous Captain Aptos), rapper Teren Delvon Jones (aka Del Tha Funkee Homosapien and Deltron Zero) and DJ Eric San (aka Kid Koala and Skiznod the Boy Wonder), with many other artists, e.g. Damon Albarn, Sean Lennon and Paul Huston (aka Prince Paul) - all taking on various futuristic pseudonyms, like MC Paul Barman (aka Cleofis Randolph the Patriarch).