Martin M. Davidson, 94, who formerly lived in Westport for 50 years, died Aug. 15 in Palm Beach, Fla. He was the husband of Edith (Elving) Davidson of Palm Beach.

Born Feb. 28, 1917, in Youngstown, Ohio, he was the son of the late Rabbi Isidadore and Rose Miriam (Ginsburgh) Davidson. He graduated from GAR Memorial High School in Wilkes-Barre, Pa., and Harvard University, and took his first job in publishing with Broadcast Magazine in Washington, D.C.

He served in the Marine Corps during World War II in Guam and Iwo Jima, and retired as a major. He was advertising director of Scientific American Magazine and partner and president of Harlemark International. He bought National Profit-Sharing Co. and ran it until he retired in 1979.

He also volunteered for many years at the Norwalk Hospital and was a former member of the Y's Men.

Besides his wife of 64 years, he is survived by three sons, Dr. Bruce Davidson and his wife Naomi, Grant Davidson and his children Melanie, Brendan and Cassandra, and Craig Davidson, all of Westport; a daughter, Abby Korotney, her husband David and children Jared and Alec, all of Ypsilanti, Mich; two sisters, Betty Braun of Chicago, Ill., and Helen and Robert Siegel of Birmingham, Mich.