noun
shah
SHAH/ʃɑː/
A title formerly used for a king of Iran or Persia.
The shah sits in formal Persian court clothing before his attendants.

Etymology
The ancestor meant “king,” and the Persian title likewise designated the ruler of a land. English uses it specifically for the monarch of Persia or Iran.
In context
The previous ruler of Iran, Mohammed Reza Shah, which just means "King," had fled the country.