The name Bulgaria comes from the Bulgars, a group of people from Turkic origins who created the First Bulgarian Empire. The meaning of their name is not fully known, but it may be linked to an early Turkic word, bulģha, which means "to mix," "shake," or "stir." A related word, bulgak, could mean "to rebel" or "to cause disorder." This might explain why the Bulgars were sometimes called "disturbers." Other groups in Inner Asia with similar-sounding names, like the Buluoji, were also described as "mixed race" and "troublemakers" during the 4th century AD.