Which of the following titles is the German word for "emperor"?
Correct answer: Kaiser

Paulus of Tarsus
Caesar's name was pronounced Kae-sar in his day, sounding similar to Kaiser.
The letter C in Latin does not have a soft sound. Always a hard sound identical to K.
Cicero would have been pronounced as "Kee-keh-roh"

little b
I've not heard of I
kalis

lemmy
Wilhelm, the tsar and king George were all the grandsons of queen Victoria

Nexus 6
“Der Kaiser” - Franz Beckenbauer.

Republic of China
Shah is title for emperors, kings, princes and lords of Iran
Pharaoh is title for such rulers in Egypt
Rajah is title for a king or prince in India.