Marmais (Bulgarian:Мармаис; died 924) was aBulgarian military commander, nobleman andkomita (duke) of a western Bulgarian region (Sredets orMacedonia) during the reign of EmperorSimeon I (893–927). He was a descendant of an ancient Bulgar family. He participated actively in theByzantine–Bulgarian war of 913–927 but he is better known for his interference and campaigns against thePrincipality of Serbia.
In 917 the Serb princePetar Gojniković, who was an ally of the Bulgarian Emperor openly changed sides and supported theByzantines. This danger from the rear played a significant role for the delay of the advance towardsConstantinople after the striking victory atAnchialus. In the fall of that year Simeon sent apunitive expedition force against the Serbs, led byTheodore Sigritsa and Marmais. They convinced Petar Gojniković to meet them, captured him and sent him toPreslav. They appointed Peter's cousinPavle Branović the succeeding ruler of Serbia, but three years later Pavle also betrayed his alliance with Bulgaria. Marmais changed him withZaharije Pribisavljević but he also started hostile actions against Bulgaria in 924. Marmais and Sigritsa lead a small army against Zaharije but they were ambushed and defeated, and their heads were later sent to the Byzantines.
The death of Marmais caused a majorcampaign against the Serbian principality which was defeated and annexed.
Marmais Point onTrinity Peninsula,Antarctica is named after him.