This is taken from old Portent, might have been posted here somewhere but I couldn't find it. Can't remember who wrote it.

I've been working on this for MONTHS and here's the latest version of my "Who's Who In The 41st Millennium"...

Abaddon, Chaos Champion, Warmaster of The Black Legion and ex-Captain of the 1st Company of the Lunar Wolves:
- Revelations 9:1-11 mentions an angel named Abaddon.

Ahriman, Chief Librarian of the Thousand Sons of Magnus The Red:
- Named after Persian deity which was very similar to Hermes/Mercury. In Zoroastrian religion, Ahriman was also the name of the devil.

Al-Rahem, Imperial Guard Captain:
- Looks like Yassir Arafat, leader of the PLO.
- Al-Rahem comes from "al-Raheem", which means "The Redeemer" or something like that in Arabic. (I don't speak arabic, so please let me know if it means something else)

Anghkor Prok, Legendary Kroot Shaper:
- Angkor Wat, ruinous temple in Cambodia.
- Amalgam of native american chieftains Sitting Bull, Geronimo and Crazy Horse.
- When you say "Anghkor Prok" really fast it sounds like Ankh Morpork, the name of a city in the Discworld books.
- The polite Hork-Bajir in Animorphs?
- Communist guerilla leader Ernesto "Che" Guevara.
- His political opponents would like to view him as Tonto, the loyal native companion of Black Mask. (a masked cowboy in a 1950s TV series)
- Not particularly related to Anghkor Prok, but doves are supposed to say "kroot."

Angmar Strick, Inquisitor of Ordo Xenos:
- The Witch-King of Angmar.

Angron, Primarch of the World Eaters:
- Aragorn from Lord Of The Rings?
- Angra Mainyu, an evil spirit in zoroastrian religion.
- Modelled upon slave rebellion leader Spartacus.
- Early career similar to that of Conan the Barbarian.

Aun'shi, Tau Ethereal:
- Aum Shinrikyo, japanese doomsday cult which killed 12 people in a nerve gas attack on Tokyo's subway (yikes!)
- Fights in the same kendo-ish style as Darth Maul.

Artemis, Deathwatch Space Marine:
- In greco-roman mythology, there was a goddess called Artemis.
- Looks like Flash Gordon.

Asmodai, Interrogator-Chaplain of the Dark Angels:
- Named after Asmodaeus, a demon in Judaeo-Christian religion. In the kabbala, Asmodaeus is a friendly demon, which is why GW didn't reserve the name for some evil guy.

Azrael, Chapter Master of the Dark Angels:
- Named after and modelled upon an Islamic angel named Izra'il.(Word is of the same origin as "Israel")

Barbaretta, Adeptus Arbites Security Enforcer:
- 1968 cult movie "Barbarella" starring Jane Fonda.

Bellerophan, Dark Angels Librarian:
- Bellerophon, the hero in ancient greek mythology who slew the Chimera. (Maybe that Librarian has developed a psychic power especially for the purpose of destroying APCs??)

Bradburn, Imperial Guard Captain mentioned in WD265 short story:
- Ray Bradbury, author of famous sci-fi books such as "The Martian Chronicles" and "Fahrenheit 451."

"Try Again" Bragg, Imperial Guard Trooper:
- American civil war general Bragg.

Cassius, Ultramarines Chaplain:
- Cassius Clay.
- Roman consul Cassius who acted as a military commander during the Punic Wars.

Cortez, Crimson Fists Captain:
- Spanish Conquistador Hernando Cortez.

Cheka, Delaque Gangster and old acquaintance of Kal Jerico:
- A soviet agency was originally named Cheka.

Chenkov, Imperial Guard Captain:
- Ensign Pavel A.Chekov from Star Trek: The Original Series.

Cleander von Castellan, Rogue Trader:
- There was once a movie named "Rogue Trader."

Commodius, Ultramarines Space Marine who once was encased in a Dreadnought:
- Roman emperor Commodus.

Covenant, Inquisitor:
- The Ark Of The Covenant?
- The "Thomas Covenant" books.
- There's a band called Kovenant.

Cypher, Fallen Dark Angel:
- Modelled upon The Stalker, a character in a Clint Eastwood film.
- Has similar problems with a legendary sword as Aragorn in Lord Of The Rings.
- Siegfried in "Niebelungenlied" has a similar problem with his father's sword.

Dante, Blood Angels Chapter Master:
- Italian poet Dante who wrote "The Heavenly Comedy"

Delphan Gruss, Adeptus Mechanicus Magos:
- Gruss, a character from the 1985 post-apocalypse movie America 3000.
- Uses some machinery to speak like Stephen Hawking.

Doombreed, Daemon Prince of Khorne
- It has been suggested that Doombreed's human identity was either Adolf Hitler, Genghis Khan or Napoleon Bonaparte. (although it also could be Steve Urkel)

Dorden:
- Dennis Norden.

Dorian Black, Imperial Guard Sergeant:
- Name refers to the classic novel "The Picture of Dorian Grey."

Eldrad Ulthran, Eldar Farseer:
- Dr.Spock from "Star Trek: The Original Series?"
- Eldrad's first syllable, "el," means "god" in Ancient Semitic. (The arabic word for god, "Allah", derived from this)

The Emperor:
- Roman Emperor Augustus.
- This thing with a nameless Emperor could be a reference to the norwegian band Emperor.
- The Emperor in Frank Herbert's Dune.
- Funky Emperor Cletus Awreetus Awrightus, character from Frank Zappa lyrics.
- The story of the Emperor's ascension upon the Golden Throne reminds me of the lyrics to the Procol Harum song "For Liquorice John."
- Sigmar Heldenhammer, the God-Emperor from Warhammer Fantasy Battle.
- Jesus. (both died to save humanity, both did many miracles and accomplished great feats during their lives, both founded religions on their own and both had an Inquisition kill people in their names)
- Could have similarities with Kahless the Unforgettable, the founder of the Klingon Empire.
- The story of the Emperor's gourd is straight out of the Monty Python movie "Life Of Brian."
- Modelled upon Egyptian deity Osiris:
BOTH had a son named Horus,
BOTH were great statesmen when they lived,
BOTH were betrayed by somebody very near to them,
BOTH were killed and then healed back to a state of undeath by one of their
closest friends and BOTH became elevated to gods upon their introduction to
undeath.
- Huang-Ti, deified Chinese Emperor.

Eran Gudi, Imperial Preacher:
- Anagram of Guderian. Heinz Guderian was a German general during WW2.

Ephrael Stern, Sister of Battle:
- Ephraim Stern, acclaimed archeologist.

Erasmus Tycho, Blood Angels Captain:
- The Phantom Of The Opera.
- Tycho Brahe, danish renaissance scientist.
- Looks like Duke Nukem with a mask covering half his face.

Ezekiel, Grand Master Librarian of the Dark Angels:
- Ezekiel, Old Testament prophet often credited for being the first man to witness an UFO sighting.

Ferrus Manus, Primarch of the Iron Hands:
- Heracles/Hercules??

Gal Markit, Imperial Guard Commander:
- Name is an obvious reference to Gul Dukat, a Cardassian officer in Star Trek.

Garro, Death Guard Captain:
- Greta Garbo.

Ghazghkull Mag Uruk Thraka, Ork Warlord:
- Margaret Thatcher???

Gregor Eisenhorn, Inquisitor:
- Looks like Ike Eisenhower, the 35th president of the USA.
- Revisionist historian and conspiracy theorist David Irving.
- Monty Burns from The Simpsons? (and that must make Slick Devlan... Waylon Smithers?)
- Eisenhorn is german for "Horn of ice."
- Has following similarities with Richard Owen, the british biologist who coined the term "dinosaur": They look a little similar, both have earned enmities in order to accomplish their goals, both believed ultimately in "The Ends Justify The Means" and both were deeply religious.
- One of the more radical Popes was named Gregorius.
- Has following similarities with Victor Frankenstein from Mary Shelley's novel Frankenstein:
Both are very learned;
Both have similar names (a first name which ends with "or" and a germanic-sounding last name)
Both do weird, creepy activities involving bodies - with only the loftiest of goals in mind;
Both have loyal, hunchbacked henchmen (Frankenstein has Igor, Eisenhorn has Quovandius).
- On the cover of a book about Frankenstein (a simplified version of Mary Shelley's original novel), the monster looks like Gregor Eisenhorn.

Guzmann Ludd, Necromundan Guilder:
- Looks like danish comedian Amin Jensen.
- Also looks like Sun Myung Moon, founder of the Unification Church. (but without Sun Myung Moon's mongolid facial features of course)
- Could also look like Steve Jackson.
- A latin-american revolutionary was named Guzman.
- The Luddite movement, a movement which attempted to halt the industrial revolution. Apparently, they failed.

Helveticus, Ultramarines Standard Bearer:
- Helvetia, the latin name for Switzerland.

Hieronomus Tezla, Tech-Priest:
- Nikola Tesla, russian scientist
- Charles Darwin?

Horus, Primarch of the Lunar Wolves:
- An Egyptian deity was named Horus.
- Modelled upon Lucifer, the devil in Judaeochristian religion.

Huron Blackheart, Chapter Master of the Astral Claws and Tyrant of Badab:
- Modelled upon the pirate Blackbeard.
- The furry beast Hamadrya who he lives with is a reference to the Procol Harum song The Devil Came From Kansas, which mentions a guy with a monkey riding upon his back. "There's a monkey riding on my back, has been there for some time - he says he knows me very well, but he's no friend of mine"
- The furry little pet creature could also be modelled upon the Tribbles from Star Trek. (The tribbles were also popular as pets amongst Starfleet officers until it was discovered that they multiply faster than you can say "NI!")