Two entries with the name Sortibran.
Sortibran
Sortebran
A Saxon warrior killed by King Ban of Benoic at the battle of Carhaix.
Sources
Vulgate Merlin | 1220-1235
Arthour and Merlin | Late 13th century
Sortibran
A knight killed by Gawain while trying to abduct a lady.
Source
Vulgate Merlin | 1220-1235