False Columns were pretenders to Column name. They were powerful individuals, but they did not have what it took to be a full-blown Column. Eventually, they died out when Column age ended and the Pillars rose to power.
During their hay-day, some eventually were absorbed into the greater Column forces. Others died trying to get their names heard. Most were Warlords or generals who had abandoned their loyalties for power. A few were just twisted individuals, or just insane, more than capable of making crazy inventions, a few which could defy reality, and subsequently killed their creators.
Because of their less-than-famous nature they are not found in many histories. Recent discoveries, like Oregino's Facility, have shown that there may be more than what were accounted for.