Excellent question. I was on the fence about including that bit talking about how to say Islay! But I am happy I did. When you say eye-la , I assume you mean a long a, as heard in the word lay. I typically hear it being spoken with a soft uh sound (much the a in soda), and less typically I hear it spoken with a soft "ah" sound (much like the sound in blah) . Either way, the soft sounds I describe are very similar to each other, and might even be used interchangeably. I am quite confident that the long a sound is not used by locals (and Scots in general) when uttering Islay.