Malamir became ruler of Bulgaria in 831 on the death of his father Omurtag, because his older brother Enravota (Voin) had forfeited his right to the succession by becoming a Christian.
Following the passing of his father Omurtag, Malamir took control of Bulgaria in 831. This was due to his brother Enravota (Voin), who had previously been eligible for succession but had abandoned his right to rule after embracing Christianity.