The term 'Former Russian Ruler' can be described by three different words: TSAR, CZAR, and Tzar. TSAR is a Slavic title derived from the Latin word Caesar, which was used to refer to a ruler or emperor. CZAR is a variation of the word TSAR, and is also used to refer to a ruler or emperor. Tzar is another variation of the word TSAR, and is also used to refer to a ruler or emperor. All three words are used to describe a former Russian ruler.