|Colour Scheme||House Info||Symbol|
|Motto:||Honour thy Forge, Honour the Primus Ordinus.|
The first Knightly House to be established, House Taranis was founded on Mars before the formation of the Imperium. This truly ancient house predates any other by many hundreds of years. As the industries of the red planet developed into a vast metropolis of technological mastery, so too did it evolve to become the first and foremost of the forge worlds, and the Knights of House Taranis were its guardians. The STC technology supplied to many of the Expeditionary Fleets during Mankind’s expansion across the stars included designs for armoured suits of exo-armour based on those first developed to be used by the Knights of Taranis. When the Knight worlds were first rediscovered during the Imperium’s Great Crusade many thousands of years later, it is likely that the Mechanicum used their intimate knowledge of the Knight suits worn by House Taranis to help win the loyalty of those worlds.[2a]
House Taranis remained loyal to the Imperium during the Horus Heresy, taking part in the Battle of Mars on the side of the forces of Kane. All but two of them were killed, fighting the forces of the Dark Mechanicum. Two members of the Knights of Taranis survived and went into hiding, but their later fate is unknown.
- Baron Solon Rhadamanthine — Pilot of a Knight Crusader.
- Baron Cavanix — Pilot of the Knight Warden Crimson Destroyer. Led the Knights sent to aid the world Frontis.
- Sir Darkarrus — Pilots the Knight Paladin Scarlet Doom
- Sir Archimaxes — Pilots the Knight Castellan Devastation Unbridled
- Drantar — Knight Crusader Red Might.[5b]
- Govatek — Knight Valiant Olympus Resurgent. Among the Knights sent to aid the world Frontis.
- Tovekh Mau — Knight Castellan Scion of Chryse. Among the Knights sent to aid the world Frontis.
- Razelon — Knight Crusader Spirit of Voltaire. Among the Knights sent to aid the world Frontis.
- Seneschal Halver[2b]
- Metalus Imperius — Knight Seneschal
- Soberan — Pilot of Omnissiah's Fury.[5b]
- Taymon Verticorda — Lord Commander during the Horus Heresy
- Lord Therberax — Pilot of a Knight Errant.
- Sir Xantek — Pilot of Blade of Mars[5b] Terribly wounded by a Chaos Titan. He has survived the Ritual of Becoming twice and embodies his house's ability to rise again from darkness.
- Valek — Pilot of Red Warrior during the War of the Beast
- Raf Maven — Knight during the Horus Heresy, pilot of Equitos Bellum
- Ulantor — Noble
- Soberan — Noble
- Thassor — Exterminator of Daemon Engines. Pilots the Knight Warglaive Red Jackal, whose machine spirit is predatory and aggressive.
- Bondswoman Jocasta — Knight Warglaive Argyre. Among the Knights sent to aid the world Frontis.
- Bondsman Fovin — Knight Warglaive Aram. Among the Knights sent to aid the world Frontis.
- Bondsman Hastaelock — Knight Helverin Lyot. Among the Knights sent to aid the world Frontis.
- Bondsman Fargrim — Knight Helverin Zunil. Among the Knights sent to aid the world Frontis.
- 1: Mechanicum (Novel)[Needs Citation]
- 2: Codex: Imperial Knights (6th Edition)
- 3: Warhammer: Visions 8, pgs. 170–171
- 4: White Dwarf 36 (2014), pg. 22
- 5: Codex: Imperial Knights (7th Edition)
- 6: White Dwarf 127 (2016) — Regiments of Renown
- 7: White Dwarf September 2016 — The Ultimate Guide to Imperial Knights
- 8: Codex: Space Marines (8th Edition), pg. 20
- 9: Codex: Imperial Knights (8th Edition), pg. 44
- 10: Codex: Adeptus Mechanicus (8th Edition), pg. 57
- 11: White Dwarf July 2018 — Battle Report: A Gauntlet Thrown Down
- 12: Codex: Imperial Knights (7th Edition), pgs. 8-9