Signiory or Seigniory: How To spell?

The word Signiory 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 'I' as letter 'E' is phonetically ignore
Wrong Spelling:  s-i-gniory 
Correct Spelling:  s-ei-gniory 
Find more incorrect spellings of Seigniory to spell right way.