Well I did, but guess what, when I told my wife the result she said: "
go tell that to the Marines"! (I think that means she is a little sceptical

- and wonders why, over the years neither she nor her parents before her, ever heard it referred to as such).
As for me I am quite prepared to believe such short-forms exist with their origins often lost in antiquity. If Brummagem can turn into Birmingham and local places from my birth area lose a syllable here and there when spoken of in purist terms, I am sure Hunstanton can survive having a 3 syllable pronunciation.