Back in college I had a professor... well, he was more like a P.E. teacher, but skip that... whose last name was Pizza. He pronounced it "pie-zah", and took great umbrage at the suggestion that it really ought to be pronounced the way it was spelled. Unsurprisingly (perhaps), my brain simply refused to process the word as a name; I had to make a conscious effort, every time, to say it right. It didn't help that I didn't have a high opinion of the guy; I suspect my brain would have cut him more slack if I'd respected him more.
I was reminded of this a week or so back, when we received a note from the teacher for Secondborn's Mother's Day Out program (which is basically a shorter version of daycare). She introduced herself as Ms. Ally, and once again my brain insists that it obviously must be pronounced like the word ally - "owl-eye".
But there's a difference: it turns out that Ally is actually the teacher's first name. Which means it's almost certainly a short form of Allison, and pronounced more like "alley." Suddenly I have no trouble whatsoever remembering the correct pronunciation, apparently because it's her first name rather than her last.
My brain is weird.