Mordehai Frizis (Greek: Μαρδοχαίος Φριζής; Chalkis, 1 January 1893 - 5 December 1940) was a Romaniote Jew, who became an officer of the Greek Army, reached the rank of Colonel and was killed during the Greco-Italian War on 5 December 1940, fighting against the Julia Division. He was one of the first Greek senior officers to be killed in action during the war. The Greek state has honoured his memory by erecting busts of his at the War Museums of Kalpaki and Athens, in his birthtown of Chalkis, and by giving his name to an Athens street.