...as Sel-tic rather than Keltic? Before they were founded, no such pronunciation existed as far as I'm aware. Everyone knew the word as "Keltic", so do you think it was difficult to have the name known as "Sell-tick"? And what was the thinking behind this anyway? It's something I've never seen mentioned in any Celtic history book.

Now, virtually every sports club with "Celtic" in their name have it pronounced the same way. The original Celtic started a bit of a trend!