What is the origin of name Slovakia?

The name "Slovakia" is derived from the Slavic word "Slověne", which means "Slavs". The name "Slověne" is first attested in the 6th century in the work of the Byzantine historian Procopius. The name "Slovakia" was first used in the 9th century to refer to the territory of the Principality of Nitra, which was one of the predecessors of modern Slovakia.