For centuries the Welsh and the English have claimed him as their own. And most historians have believed Merlin was a mythical figure.
But a new book by Adam Ardrey claims he was real — and rather than Camelot, lived in a house in what is now the Partick area of Scotland’s biggest city in the year 600.
He has gone as far as identifying the exact location — Ardery Street, just off the city’s Dumbarton Road.
It is best known as the area where comedian Billy Connolly grew up.
Ardrey says his research shows Merlin was born in 540 in the Cadzow area of central Scotland.
He argues that Merlin’s real story has been suppressed by Christian writers.
But Mr Ardrey is certain Merlin possessed no special powers, and in reality was a politician and scholar.