That's something which occasionally pops up on the P&P board. But if so- who's been bearing what for so long? And is Meryton very merry or just meritorious? Or is it simply Jane's version of the Hampshire village/town of Cheriton? Is Lambton anything to do with lambs, or is it a sly reference to the pennine town of Shipton?( it's not Derbyshire, but it's definitely Peaks and a tourist spot.) Where does that put Hunsford, Netherfield, Rosings, Brighton, and Gracechurch street?

It's a nice idea, but I think if you find pun in one, you have got to find a pun in a lot of them, before you discover anything significantin JA's writing method.