Viceroy
Viceroy was a royal title given to a person who ruled over a province or region as the agent of a sovereign (a "vice-royal"). 

In 2373, the  Viceroy of Denar of the planet Ilari was prepared to provide Tieran political (and potentially military) support in exchange for more territory. ()

In 2379, a Reman aide acted in the capacity of a viceroy to Praetor Shinzon during Shinzon's short-lived coup d'état against the Romulan government. ()

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Titles