Isteddfod or Eisteddfod: How To spell?

The word Isteddfod is misspelled against Eisteddfod, a noun meaning "Am assembly or session of the Welsh bards; an annual congress of bards, minstrels and literati of Wales, -- being a patriotic revival of the old custom."

Word begins with consecutive vowels 'EI' followed by alphabets 'steddfod' is misspelled as 'I' as letter 'E' is phonetically ign
Wrong Spelling:  i-steddfod 
Correct Spelling:  ei-steddfod 
Find more incorrect spellings of Eisteddfod to spell right way.