I suppose the king (brenin) in the name of this cairn could be Arthur, or some other nameless king lost to memory. It would be more exciting though if it were the spooky Brenin Llwyd – the Grey King of Snowdonian myth. But I suppose he’s not really mortal enough to need a grave.
Read about the Brenin Llwyd at Mary Jones’s site:
maryjones.us/jce/breninllwyd.html