Ostaun or Ostein: How To spell?

The word Ostaun is misspelled against Ostein, a noun meaning "Ossein."

Word contains consecutive vowels 'EI' in between alphabets ost & n is misspelled as 'AU'
Wrong Spelling:  ost-au-n 
Correct Spelling:  ost-ei-n 
Check more misspelled words of Ostein to spell it correct.