Daniel M. Lewin, American mathematician and businessman, co-founded Akamai Technologies (b. 1970)
Daniel Mark Lewin (Hebrew: דניאל "דני" מארק לוין; May 14, 1970 – September 11, 2001), sometimes spelled Levin, was an American–Israeli mathematician and entrepreneur who co-founded internet company Akamai Technologies. A passenger on board American Airlines Flight 11, it is believed that Lewin was stabbed to death by one of the hijackers of that flight, and was the first victim of the September 11th attacks.