Latvia is a parlimentary democracy. As such, there is no one person who "rules". The President of Latvia is Valdis Zatlers, however the powers of the President, as compared to Presidential democracies liek the U.S.A., is extremely limited.
What was the title of ruler of hyedrabad in 1947
Emperor is the title given to the ruler of an empire.
The title bestowed on a female ruler of Hanover is Electress
shahs
Alexander The Great
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Czar
Bolsheviks
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Emir - Title of a Muslim (Mostly Arabic) ruler.
One ruler was Pharaoh Siamun (Pharaoh being the title).