Tim

Tim (perhaps Tim Bombadil) is the 'nuncle' of Tom Bombadil. In the poem The Stone Troll.

Background
Tom runs in with his big boots on, he runs into a troll eating the shinbone and skins of his nuncle Tim. The troll had been knawing on the bones for several years. He tries to argue for the troll to return the bone. He mentions that Tim has been gone for many a year. He mentions it should have been in a graveyard (Barrow-downs?). The troll admits that he stole the bones from a hole, and it was ok for him to take them because he had been dead already before he found the shinbone. Tom was upset that the troll would take the bone without asking first, for the shin of his father's kin. He asks for the dwarf to return the bone. The dwarf threatens Tom, if he doesn't leave, he'll eat him as well (that meat would be better than bone). He attempted to capture Tom, but tom slipped away behind him and kicked him from behind (not even putting a dent into the flesh of the troll), and hurting his toes in the process, and losing his boot. Tom hobbled home without his boot, or his nuncle's bones.

Behind the scenes
This is a story within Hobbits stories, myths and legends, and likely based on their interpretation of Tom probably being a man, but long lived, rather than a powerful force of nature. As such Tim may not have actually existed.