Sebastokratōr (;
Bulgarian and
Serbian: Севастократор; both pronounced
sevastokrator) was a senior court title in the late
Byzantine Empire. It was also used by other rulers whose states bordered the Empire or were within its sphere of influence (
Bulgarian Empire,
Serbian Empire). The word is a
compound of "
sebastos" ("venerable", the Greek equivalent of the
Latin Augustus) and "
kratōr" ("ruler", the same element as is found in "
autokratōr", "emperor"). The wife of a
sebastokratōr was named
sebastokratorissa (Greek: σεβαστοκρατόρισσα) in Greek or
sevastokratitsa (Cyrillic: севастократица) in Serbian and Bulgarian.