While southern Scotland was thus English and Cymric, the north, from Cape Wrath to Lochaber, in the west, and to the Firth of Tay, on the east, was Pictland; and the vernacular spoken there was the Gaelic. The west, south of Lochaber to the Mull of Kintyre, with the isles of Bute, Islay, Arran and Jura, was the realm of the Dalriadic kings, Scots from Ireland (503): here, too, Gaelic was spoken, as among the " Southern Picts " of the kingdom of Galloway.
Edinburgh, a dubious etymology), and in that kingdom St Aidan, from Iona, erected the Columban churches under the auspices of Oswald, whose brother Oswin dominated Strathclyde and Pictland up to the Grampians; the English element, for the time, extending itself and anglicizing more and more of the Scotland that was to be.
The English Christians overcame the Celtic divines of Iona, and in 710 even in Pictland they came into the customs of western Christianity.
761), was victorious while in his prime, and then consolidated Pictland; but (802-83'9) the Scandinavian sea-rovers began to hold large territories in Scotland,weakened the Picts, and made easy their conquest by Kenneth MacAlpine of Kintyre, the king of the Dalriad Scots of Argyll.
The consequence was that what had been Pictland came to be styled Scotland.