I can’t find the thread now, but I remember a little while back in this lovely forum of interesting and interested people there was a bit of discussion about the origin of Lloegr England.
Well, look what I came across as I was sitting with my americano in Costa this morning perusing (as you do) Tolkien & Gordon’s edition for Oxford of Sir Gawain and the Green Knight :
(Whether we can believe Geoffrey, of course, is another matter. I think he sometimes made things up… 
)
Yes, I would tend to agree although since I, too, am “of Monmouth”, I prefer to think of it as him using (lots of) poetic licence! 
So, are you just going to leave that there with a hanging
and not tell us what the heck that is all about? 
It was a party game back in those days, if Tolkien and Gordon are to be believed…
It’s great to have an explanation, even if it is made up poetically embellished. 
Thinking about it, with such precedents, it is hard to blame Iolo Morganwg!
