THE AGE OF ARTHUR, PART NINE: THE ORIGINS OF ARTHUR

"The Brythonic/Celtic word for bear is arth, or “Artos”. One theory is that the name “Arthur” derives from this root. Another possible source of the name may have its roots not in the Celtic languages, but in Etruscan: a Roman officer stationed in Britain in the 2nd or 3rd century bore the name Lucius Artorius Castus; whose family’s origin may have come from Etruria, in Italy. The name may have lived on in Britain after his departure, in a family he may have sired."