>There actually are exceptions, but they are regular as well - w before last syllable is often devoiced to f. Levandofski. But even most Polish speakers doesn't know that it's the rule, they just speak that way without thinking :)

Well, true, but I don't think devoicing w in 'Levandofski' is correct, sounds a bit sloppy but hard to hear the distinction to be honest so maybe

There is though a clear devoicing not only before the last syllable but before 'sz' as in 'wszystko'(all), 'wszędzie'(everywhere). Not sure if there's a surname that that applies to.