Emrich "Imre" Lichtenfeld (Hebrew: אימריך “אימי” ליכטנפלד) (May 26, 1910 – January 9, 1998) was a Hungarian-born Israeli martial artist who founded the Krav Maga self-defense system. He was also known as Imi Sde-Or (Hebrew: אימי שדאור), the Hebrewcalque of his surname.