Hygean or Hygeian: How To spell?

The word Hygean is misspelled against Hygeian, an adjective meaning "Relating to Hygeia, the goddess of health; of or pertaining to health, or its preservation."

Word contains consecutive vowels 'EI' in between alphabets hyg & an is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  hyg-e-an 
Correct Spelling:  hyg-ei-an 
Explore spell check of Hygeian to spell without errors.