Knights-Errant

The Knight-Errant are/were a group of Space Marines brought together from various different Legions at the behest of Malcador the Sigillite in order to create a cadre of the best and brightest that the space marines had to offer, and use them to form a new Chapter to combat the threat of daemons and forbidden magic that the Imperium was not prepared to fight against due to the erasure of all knowledge of them as part of the Imperial Truth.

Despite what we think we know of the original Grey Knights and that eight of the companions would become the first Grand Masters of the new chapters, those that initially joined the first member Nathaniel Garro may not necessarily be destined to become Grey Knights themselves. Author James Swallow has came out and said as much himself in an interview, but beyond that we know that many members of the Knights Errant would not survive the Horus Heresy.

Known Members

• Nathaniel Garro - Death Guard Captain of the Eisenstein. The first member; the guy who fled the massacre at Istvaan III and managed to bring word of the Horus Heresy to the Imperium.

• Tylos Rubio - An Ultramarines Librarian who was the first member to be inducted by Garro. He was recruited in the midst of the Battle of Calth (a fact itself gives lie that vessels could not travel in & out of the ruinstorm that was blinding Macragge to the rest of the Imperium).. Rubio would essentially become the Garro's second in command for several missions, and got his own job of travelling to Baal to collect all of the wargear of the Blood Angels (to give to the future Grey Knights) when everyone thought Sanguinius had fallen at Signus.

• Macer Varren - A World Eaters Captain who was one of a group of loyalist refugees that fled to the Terran Solar system, a cockney-marine and an utter badass.

• Sevarian (The Wolf) - Not a Space Wolf, though artwork portrays him to look similar to one, but a Luna Wolf. He was a member of the Crusader Host (basically Space Marine Ambassadors to Terra) but was imprisoned on Terra when his legion went rogue. He broke out of prison and was brought back into the fold by the Samurai (not kidding) Nasagena.

• Bror Tyrfinger - An actual Space Wolf.

• Ares Voitek - Iron Hands Techmarine.

• Fel Zharost - A Night Lords Chief Librarian who, was exiled by Sevatar after the Edict of Nikaea mostly because no-one could be bothered to care about the Librarius except Zharost himself. He somehow fled to Terra and was eventually collected for induction into the Knights-Errant.

• Ison - A Librarian, assumed Blood Angels

• Garviel Loken - A Luna Wolves Captain who is very much the protagonist of the first trilogy of Horus Heresy novels, was thought dead after being defeated by Abaddon at Istvaan III and having a building collapsed on him. Was encountered in a maddened state and it took a few knocks to bring him to his senses. Was supposedly the final member that Garro would recruit, although other members were inducted after Loken himself.
  • Currently the only member with tabletop rules in Horus Heresy, though that's his pre-Knight status.

• Theodor Ruttveld - A Space Wolf, was assigned to watch over Konrad Curze and ensure that the Edict of Nikaea was obeyed. Heavily maimed by Curze and delivered to Terra as a message. It is uncertain if he is to become a Knight-Errant though he he kept alive on the Sigillite's Authority and it is made clear that he it to be kept as whole as possible and not interred in a Dreadnought.

Deceased Members

As we know several members were inducted into the Knights Errant, but many did not survive, and considering that the number above is greater than eight, we know that several more will perish or find other duties.

• Iacton Qruze - The "Half-Heard" mostly because no-one was paying attention to what the old coot was saying. Gets the job of overseeing the prisons on Titan for people who know far too much to be let loose in the Imperium, though is killed by Horus on board the Vengeful Spirit.
• Tubal Cayne - Iron Warriors member of the Crusader Host like Severian.
• Rama Karayan - Raven Guard
• Altan Nohai - White Scars Apothecary
• Callion Zaven - Emperor's Children Champion.

Grey Knight Grand Masters

We know that there were eight Grand Masters who travelled with Malcador to Titan when it was cast into the warp, unfortunately we don't yet know who they all are yet, and is made more difficult to guess since Grey Knights ritually change their names to mirror their daemonic foes.

1. Janus - Known to us as the first Supreme Grand Master, though his original name and legion remain unknown.

Considering a bunch of circumstantial evidence One candidate to Janus' identity could (stressed "could") be the Twin-Primarch Omegon.

5. Epimetheus - A Dark Angels psyker of prodigious strength who survived into the 41st Millennium by being trapped in the Damnation Cache on Pandorax.

His original name is unknown, but one consideration could have been Zahariel who may have joined the Knights-Errant instead of the intended membership of Cypher.

Epimethius would eventually be captured by Abaddon and given to Fulgrim in a bid to gain the allegiance of the Emperor's Children for the 13th Black Crusade, Epimethius himself was intended to become the Avatar of Slaanesh.

8. Kyron - We don't know much about him other than a brief mention that he's buried on Titan.

Human Members

While not necessarily Knights-Errant, we also know that four humans were recruited by Malcador to form the founding members of the Inquisition.

• Yasu Nagasena - the Last Samurai
• Hassani Sabbyat - A Stormtrooper who was into the Sigillite's employ to collect an artefact from Egypt, despite being told not to look into the box, he did and was brought before Malcador to explain himself. It turns out that the artefact was the Rosetta Stone and Malcador was part of an order that kept history and learning safe and intact. He also gets shown the doorway to the Emperor's Webway.