FFION f Welsh form of FIONA
Incorrect: Ffion means Foxglove (plant), therfore Fiona is the English form of Ffion.
Remember: Brythoneg(old Welsh) existed before the Romans landed on Ynys Brydain (Britain).
The indiginous people of Ynys Brydain experienced a form of ethnic cleansing by Anglo-Saxons invaders following the Roman withdrawal in the fifth century. http://news.bbc.co.uk/1/hi/wales/2076470.stm
It was then the Brythoneg was split into Cymraeg (modern Welsh), Kernywek (Cornish) and Brezhoneg (Breton). There were others (in southern Scotland, Cumbria and Yorkshire), but they soon died and unfortunately no written recods exist.
Another interesting link:http://news.bbc.co.uk/1/hi/wales/1256894.stm