"after being rather stiffly corrected the other night..."

Anybody who gets "stiff" over the pronunciation of a name that is more than 200 years old is a toxic nerd. No one can be sure of how a word was pronounced that long ago. Even at the time it may have differed from region to region.

Instead of being unpleasant, that person should have been congratulating you for your interest in O'Carolan's beautiful music.

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Spaw, I'm with you. I like Jablonski myself. But then I grew up in Chicagomilwaukeeland.