We were rewatching a favorite Midsomer Murders last night, Blood Wedding. It deals with murder among the upper class and DS Jones mispronounces a name, Colquhoun, saying something like Cokiehound and of course they had to correct his pronunciation while looking down their nose at him, so he continued to mispronounce it. We roared.
It reminded us of a Wodehouse Theater episode, Strychnine in the Soup, where there is a character named Lester Mapledurham, pronounced Mum.
A year or so ago when when we were in London doing a Jack the Ripper tour the tour guide asked what part of London we were staying in and we said Southwark, pronouncing all parts of the word, he corrected our pronunciation saying that's not how we pronounce it, in a rather smug way. Later on he was checking off names to make sure everyone was there and his mispronounced our last name, and Mac said that's not how we pronounce it and told him how to. The tour guide said Touche'.