such as Welsh, Breton, Cornish, Manx and Gaidhlig (or whatever the spelling of Scot's Gaelic is

Gaelic just i'm afraid, although pronounced with an 'a' rather than an 'a'.

incidentally one of the interesting things with gaelic and gaelic is that speakers of Donegal Gaelic i know feel it is far closer to Islay and S Argyll Gaelic than either N Hebrides Gaelic or south of Ulster Gaelic. Not really surprising as the sea is a connector rather than a divider along the west coast, and we shouldn't judge the borders of the past by the borders of today. But just a nice reminder that the modern division of Ireland and Scotland is not so simple in prehistory as we might imagine