As a non english native, I'm tripping over this little grammatical question : when using a proper name (city name, first/last name etc...), and that name ends with the letter "S", if you have to add the suffix -ian to it, will you end the word in -sian, or will you double the "S" to make it -ssian?
For exemple, with the city name Dallas, would you write it Dallasian or Dallassian (yes, I know, it's Dallasite)? Or Cyrus (better be thinking about Cyrus the Great than Miley), would you say Cyrusian or Cyrussian?