The Jantine Patricians hail from Jant Normanidus. The Patricians had an infamous feud with Gaunt's Ghosts because the father of the commander of the Patricians, General Aldo Dercius, was killed by Ibram Gaunt as revenge for the death of Gaunt's own father (Dercius and his Patricians left Gaunt's father's unit to die in the face of an Ork invasion on the planet of Kentaur). Dercius was killed in dishonour so his son was stripped of all his inheritance and honour.
Forced to give up even his family name, Colonel Draker Flense (Dercius's first son) swore revenge on Gaunt and attempted to take it on Menazoid Epsilon, a moon of Menazoid Sigma. Falsely declaring Gaunt's Ghosts to be corrupt, he led his Patricians straight at the rear of Gaunt's men who were fighting inside the caves of Menazoid Epsilon. They broke Gaunt's rear defensive line with heavy losses and were in position to completely isolate and destroy the Ghosts until the Vitrian Dragoons, whose commander was a personal friend of Gaunt, attacked the Patricians. Focusing on a single weak point of their line, the Dragoons tore through the Patricians but Flense and his security detail managed to escape into the caves where they met Gaunt. Not realizing Flense was Dercius's son, Gaunt pleaded with him to stop and fight the true enemy. Flense ignored Gaunt's attempts to make peace and attacked him. Gaunt and Flense fought furiously but in the end Flense went down with all of his Patricians. Due to their heretical action in forcibly attacking the Tanith First, all records of the Patrician's honors and victories were destroyed and the regiment was never reformed.
The Jantine Patricians sported purple uniforms with many decorative gold markers to denote rank.