The Jötnar (ON: "Devourers" or "Eaters"; pronounced "YOT-nar"; singular Jötunn, pronounced "YO-tun") are a race of primordial beings that inhabit the worlds of Niflheim, Muspellheim, and Jotunheim. The most well-known Jötnar are the Frost and Fire Giants. They personify wild, chaotic, primordial forces and often interact with the gods (both the Aesir and the Vanir tribes), usually in hostile ways, but there have been instances of intermarriage between these races.