Omurtag was a ninth-century Bulgar ruler. Stone inscriptions are important evidence of his rule: they were made close to the events, but often survive damaged. At Madara the name is more secure than the surrounding account and cannot justify filling the missing words with guesses. Ruled in 814–831. His name occurs in the third Madara inscription. Was associated with the ruling centre at Pliska. His inscription shows why a surviving name and a reconstructed meaning must be distinguished.