Taff probably originated from the fact that the river that flows through the middle of Cardiff (welsh capital) is called the Taff, Irish folk we call Paddys or Micks, Scots we call Jocks and the English because it is a bigger area get even more sub-sectioned , folk from London- Cockneys, Birmingham- Brummies, Manchester-Mancs, Liverpool-Scousers and Newcastle- Geordies, so do you guys have pet names for people from different areas, I seem to remember that people from Nebraska were called "Cornhuskers" or "Bug Eaters", oh and please don't anybody get offended by these nick names, I take folk as I find them good, bad, black or white as long as they fish their alright.