Looking for names for a home-brew Chapter of Loyalist IWs

Ok so, a I’ve been wanting to make a chapter of loyalist Iron Warriors, their lore is simple, they were once Iron Warriors during the heresy, they initially sided with their Primarch but after the Iron Cage incident, they defected and created a warband that swore not to follow chaos, after a couple of years in the warp causing time dilation to the late M41, they rejoined the imperium under Inquisition supervision, they are currently working on their penance crusade for their past sins against the Imperium.