Czars have played a role throughout history. ... Originally the title “czar” was derived from the word Caesar and meant a ruler who was looked upon as claiming the same rank as a Roman emperor. “Tsar,” another spelling, was used as that of the supreme ruler of Bulgaria from 913-1018, 1185-1422 and 1908-1986.

Are Kaiser and Caesar related?

Like the Bulgarian, Serbian, and Russian word Tsar, Kaiser is directly derived from the Roman emperors' title of Caesar, which in turn is derived from the personal name of the Julii Caesares, a branch of the gens (clan) Julia, to which Gaius Julius Caesar, the forebear of the Julio-Claudian dynasty, belonged.

Are Roman emperors called Caesar?

"Caesar" is the title officially used by the Sasanid Persians to refer to the Roman and Byzantine emperors. In the Middle East, the Persians and the Arabs continued to refer to the Roman and Byzantine emperors as "Caesar" (in Persian: قیصر روم‎ Qaysar-i Rum, "Caesar of the Romans", from Middle Persian kēsar).