No, I am familiar with imam biyaldi (I make it quite often - I love it, Though isn't it "The Priest Fainted"?)
But the Welsh version was mentioned in a book called Ladyfingers and Nuns Tummies, a wonderful book about how foods got their names, by Martha Barnette. I got it from Amazon.
It was when the author was discussing the name imam biyaldi, she went on to comment that the Welsh had a dish called Swooning Priest which originated in Caerphilly, Wales, and uses Caerphilly Cheese. But in spite of having been brought up near Caerphilly and interested in food I have never heard of the Welsh dish of that name.
Incidentally, we kids always joking called Caerphilly Cuffilthy, a play on the use in Welsh of the double l.