Gareth Keenan is a fictional character on the BBC comedy The Office, played by Mackenzie Crook. He is obsessed with his past in the Territorial Army, and the fact that he is "team leader" even though this in reality gives him no power in the office.
― Anonymous User 12/23/2005
A bearer of this name is the British footballer Gareth Southgate.
Not-so famous bearer would be a small --very small-- character in Christopher Paolini's novel, Eragon. He is a bartender in a pub in the city of Teirm.
Gareth is the name of an antagonist in the television series 'The Walking Dead'. He was the insane leader of the group of cannibals known as Terminus. (Killed off far too quickly in my opinion).