A person who delibertely pronounces their own name incorrectly in a usually vane attempt to appear more interesting, from the Monty Python sketch of the early 70s.

‘Mr. Raymond Luxury-Yacht, who claims his name, while spelled as Raymond Luxury-Yacht is actually pronounced, ‘Throat Wobbler Mangrove.’
Lately it has come to include those who actually mis-spell their own name, Zooey instead of Zoe, Brion instead of Brian.
No she's a bit of a throat wobbler, she writes her name ‘Muriel,’ but pronounces her name ‘Mer-Reel,’
by Dainty Lardarse February 16, 2018