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'''House Grigoris''' is a [[Navigator]] house whose service in the [[Imperial Navy]] stretches back to the [[Age of Apostasy]].{{Cite thisFn|1}}

Their household House Grigoris was formerly renowned for producing Navigators of great distinction and when . When the [[Achilus Crusade]] was formed, a majority portion of its household members travelled traveled with the [[Crusade]] to the [[Jericho Reach]], to serve as Navigators aboard the [[Imperium]]'s vessels. Their fortune changed when [[Kokabiel Grigoris]], a member of their house, turned against the Achilus Crusade and the Imperium after the ship he served on, the ''[[Burden of Vigilance]]'', was lost in the [[Hadex Anomaly]].{{Cite thisFn|1}}

Years later In '''793.M41''', the ship reemerged, re-christened the ''[[Burden of Revelation]]'' and commanded by the now-mad and traitorous Kokabiel, and began preying upon the Crusade's vessels. Kokabiel's heresy brought shame and scrutiny upon House Grigoris and caused [[Lord Militant]] [[Solomon Tetrarchus]] to order all of the House's members recalled from active duty. They were confined to the Grigoris' temporary estate on the planet [[Carmyn]], pending a full investigation by the [[Ordo Malleus]]. As of '''817.[[M41]]''', all but three members of House Grigoris are accounted for.{{Fn|1}}  ==Notable Members==*[[Kokabiel Grigoris]], Former scion of House Grigoris, who served as Navigator on a mission to chart a stable warp route between the Cellebos Warzone and [[Samech]]. As of '''793.M41''', Kokabiel commands the Burden of Revelation and leads the heretical [[Cyclopean Congregation]].{{Fn|1}}* '''Penemue Grigoris''', Navigator who is believed to have planned to seek out Kokabiel and return him to the Emperor's Light. She vanished in the [[Charon Stars]] shortly after all of House Grigoris' members were recalled from active duty.{{Fn|1}}* '''Azazel Grigoris''', Navigator serving aboard the [[Might of Terra]], an [[Apocalypse Class Battleship]] trapped behind enemy lines in the wake of [[Hivefleet Dagon]].{{Fn|1}}* '''Araqiel Grigoris''', [[Novator]] of House Grigoris, taken into protective custody by the [[Inquisition]] after Kokabiel's fall to heresy. Current whereabouts unknown.{{Fn|1}}

*{{Endn|1}}: [[Deathwatch: The Achilus Assault]], pgs. 83-8485