The two PC D&D groups are:
The Company of the Sparrow (named after a copper coin, which they found piles of in early adventures)
The Riders of the Axe (named by the drunken axe-wielding dwarf cleric PC, when a freshly-rescued villager asked, "Who are you people?")
Superheroically, the PC groups include Pendragon, Vanguard, and Nexus.