I did think about Alba/Albion when I posted before, but couldn't find anything. I still can't - the nearest I've found is the suggestion that because the area north of the Antonine Wall was never occupied by Rome, the name simply shrank back there. It is roughly the same area as Pictland. The relationship of Albion to whiteness (as in chalk) is echoed in Pretanni (the British) which has the same root as Creta (as in Cretaceous) Pretanni is suggested as one possible source of the name of the Picts - Cruithni (or something similar). As far as I know, the only chalk north of Hadrian's Wall is a small patch inside the relict caldera on Arran, so it seems odd for the name to have migrated so far. I have a memory the source of which I have not yet been able to locate of an alternative source for Alba as in Scotland, with a relationship to the similar sound in Albania. The various maps I have of the Norse occupied area includes Caithness and Sutherland, and the Inner and Outer Hebrides, with some of the adjacent mainland.