Syegniorial or Seigniorial: How To spell?

The word Syegniorial is misspelled against Seigniorial, an adjective meaning "Same as Seigneurial."

Word contains consecutive vowels 'EI' in between alphabets s & gniorial is misspelled as 'YE'
Wrong Spelling:  s-ye-gniorial 
Correct Spelling:  s-ei-gniorial 
Find more incorrect spellings of Seigniorial to spell right way.