Tetragramaton or Tetragrammaton: How To spell?
The word Tetragramaton is misspelled against Tetragrammaton, a noun meaning "The mystic number four, which was often symbolized to represent the Deity, whose name was expressed by four letters among some ancient nations; as, the Hebrew JeHoVaH, Greek qeo`s, Latin deus, etc."
Tetragrammaton has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings tetragra & aton which should not be misspelled with single 'M'
Wrong Spelling:  tetragra-m-aton  Correct Spelling:  tetragra-mm-aton 
Find more incorrect spellings of Tetragrammaton to spell right way.