Syigniory or Seigniory: How To spell?

The word Syigniory is misspelled against Seigniory, a noun meaning "The power or authority of a lord; dominion."

Word contains consecutive vowels 'EI' in between alphabets s & gniory is misspelled as 'YI'
Wrong Spelling:  s-yi-gniory 
Correct Spelling:  s-ei-gniory 
Find more incorrect spellings of Seigniory to spell right way.