Cosoverygn or Cosovereign: How To spell?

The word Cosoverygn is misspelled against Cosovereign, a noun meaning "A joint sovereign."

Word contains consecutive vowels 'EI' in between alphabets cosover & gn is misspelled as 'Y'
Wrong Spelling:  cosover-y-gn 
Correct Spelling:  cosover-ei-gn 
Find more incorrect spellings of Cosovereign to spell right way.