830s deaths

prince and co-emperor of the Byzantine Empire

Saint Enravota () or Voin (Воин, "warrior") or Boyan (Боян) was the eldest son of Omurtag of Bulgaria and the first Bulgarian Christian martyr, as well as the earliest Bulgarian saint to be canonized.

9th-century Margrave of Tuscany and Duke of Lucca

Duke of Croatia

Norwegian Queen regnant

Muslim writer

Saint Ansegisus (c. 770 – 20 July 833 or 834) was a monastic reformer of the Franks.