Ymir is the first of the giants in Norse mythology, he dates back to the primal times before Odin, Thor or any other God exited. There was no fertile land or rich lakes with fish, so he sucked on the cow Auðhumla’s udder for his nourishment.
He formed two more giants from the sweat under his arms and a third from his legs. Ymir was eventually killed by Odin and his two brothers because they thought the giants started to breed like rats. Ymir’s body was then used to create the nine worlds in Norse mythology.