When Peter (Robin Williams) is being driven home in a cab, he makes fun of the driver's name 'Neville', asking:
Is that English?
What does it mean?
The joke is that most taxi drivers are foreign, with names that are difficult for Americans to pronounce. Sometimes cabbies give themselves English sounding names to make it easier for their passengers. Think about that scene from Horrible Bosses when the OnStar employee directs the guys to the bar where they met Jamie Foxx.