I'm fascinated to learn that someone says that Mingulay is regularly pronounced Min Gala. I've never heard such a pronunciation in the mouths of Scots or Gaelic speakers, but anything is possible in ths wild world of ours. There are two ways I've heard it said is something like the following :

more usually : ming goo lay sometimes : min geeue lay In either case the emphasis is slightly but not heavily on the first and third syllables. Ewan McVicar