Uist, or The Uists, are a group of six islands and are part of the Outer Hebridean Archipelago, part of the Outer Hebrides of Scotland.
North Uist and South Uist (/ˈjuːɪst/ or /ˈuːɪst/; Scottish Gaelic: Uibhist [ˈɯ.ɪʃtʲ]) are two of the islands and are linked by causeways running via the Isle of Benbecula and Grimsay. The entire group is also known as Uist, or 'The Uists'. https://en.wikipedia.org/wiki/Uist
I believe "bh" (and "mh") are close to "v" in English. https://forum.duolingo.com/comment/35376040/Pronunciation-Bh-and-Mh