I was wondering a couple of days ago how the Scottish author of the diatribe against English self-regard would have thought of his own people's origins. Perhaps the following, from the Declaration of Arbroath, might have influenced his thinking -

"Most Holy Father, we know and from the chronicles and books of the ancients we find that among other famous nations our own, the Scots, has been graced with widespread renown. It journeyed from Greater Scythia by way of the Tyrrhenian Sea and the Pillars of Hercules, and dwelt for a long course of time in Spain among the most savage peoples, but nowhere could it be subdued by any people, however barbarous. Thence it came, twelve hundred years after the people of Israel crossed the Red Sea, to its home in the west where it still lives today. The Britons it first drove out, the Picts it utterly destroyed, and, even though very often assailed by the Norwegians, the Danes and the English, it took possession of that home with many victories and untold efforts; and, as the histories of old time bear witness, they have held it free of all servitude ever since. In their kingdom there have reigned one hundred and thirteen kings of their own royal stock, the line unbroken by a single foreigner."

This is close to the ancestry myth of the Irish, those at least who considered themselves "Milesian", descendants of Miled, a mythical Spanish ruler. This is from a poem ascribed to Mael Muru of Fahan, a ninth century Irish monk -

Faenius came from Scythia
On an expedition;
A man illustrious, wise, learned'
Ardent, warlike.

A son was born to Faenius Farsaid
His rightful heir,
On the building of the tower by the peoples,
Niall, whom he loved.

Niall was carried southward to Egypt
By the Fenians of the blue weapons.
Scotta, daughter of the Pharaoh
Was given him as wife later on.

Lovely Scotta bore a son to Niall
After his coming to Egypt.
Hero of a hundred fights, Gaeeal Glas,
A princely upright man.

We are called Fenians from Faenius
Of unclouded fame;
We are called Gaedil from Gaedeal Glas,
Scots from Scotta's name.

No mention of Spain here but elsewhere in the poem this account is described as "the history of the sons of Miled". All nonsense of course, though recent research into the DNA of various population groups has found a close relationship between the peoples of Spain and Ireland, and the Irish and the Scots.