Little Timmy was a villager who first appeared in Warcraft III: Reign of Chaos. He was a young boy and son of Alicia. He lived in a farmhouse in a village between the Silver Hand encampment and Strahnbrad at the beginning of the Third War. While Strahnbrad was under attack by the Blackrock clan, Little Timmy was kidnapped by a pack of gnolls. Prince Arthas rescued Timmy at the behest of his mother.
Little Timmy appeared again in Warcraft III: The Frozen Throne. He and his mother Alicia can be found in Theramore in chapter II of The Founding of Durotar, "Old Hatreds", indicating their escape from Lordaeron, probably as part of Jaina Proudmoore's Human Expedition.
Speculation of Timmys
The following Timmys may or may not be the same kid, there have been no confirmation by Blizzard Entertainment and probably it's just a Blizzard joke which may never be resolved.
In Warcraft III, there is a hidden ghoul in Andorhal named Timmy, while in World of Warcraft there is a ghoul named Timmy the Cruel. They could be the same. Some speculated that the Timmy-ghoul was in fact Little Timmy at the time of Warcraft III: Reign of Chaos; however, Little Timmy later appeared Warcraft III: The Frozen Throne in the undead campaign selling Ice Shards, and in the bonus campaign set chronologically later in the timeline, Little Timmy is with his mother on Theramore very much alive.
In Stormwind City, there is an NPC named Lil Timmy who looks very much like Little Timmy from Warcraft III. Little Timmy may have later moved to Stormwind City to sell cats, explaining how there is a living Timmy there bearing such a resemblance.
- Little Timmy: Help! Help me, please. I'm trapped in the cage.
- Little Timmy: Please get me out of here. I want to go home.