orthography - Czar vs tsar - origins and pronunciation - English . . . 'the Czar' occurs in 5 places between pages 26 and 47 while 'the Tzar' is the only form in the rest of the book, as well in the index This might reflect the usage of two different writers 'Tzar' is also used in a Swedish text from the same period: Joh Widekindi Thet Swenska i Ryssland Tijo åhrs Krijgz-Historie: