Planet in AH.com Wars, the site of the big battle in Episode 4 and the equivalent of Yavin IV in Star Wars.
The name is based on the cockney phrase 'yeravinalarf' (you're having a laugh), which sounds fairly similar to Yavin.
Presumably, some substandard writer in the EU (European Union) sequel books will have the Kitjedi Academy set up on Yeravinalarf IV.