Sephiroth is spelt sephiroth however if you have any clue to the phoentics of the english language you'd realise that PH and F are the same sound therefore unless you pronouce PH differrently to F then you cannot have different ways of saying it unless you've got different accents :rolleyes2 however in the context of the english language it is SE PHIR OTH broken down in to different words that in London (no not a ney just normal Londoner e.g. Barnet north london where I am from) it would be Sep fear of put together and said quickly they become Sephiroth (accents and analysing speech is my favourite part of english Language AS)