That depends on the system of Government It could be a King, President, Primeminister, Religious leader, dictator.
Egypt.
Rutherford
Yugoslav
Morgan got its name from LDS leader
monaghan
Monaghan
Hugh pinkerton
Franklin D. Roosevelt.
The Governor, currently Linda Lingle. Every county also has their own mayor.
Sequoyah.
The British Empire
The city/county was named after a famous person, a geographical feature, an indigenous tribe, a former leader, or a historical event that was significant to the area's development.