Isaac Passy (Bulgarian: Исак Паси; 13 March 1928 in Plovdiv – 13 August 2010) was a Bulgarian Jewish philosopher[1] specializing in history, literature and aesthetics. He was a prominent professor at Sofia University from 1952 until 1993. He published over 40 monographs and edited some 80 volumes with philosophical texts and in history of philosophy from various epochs. He is the father of the Bulgarian politician and diplomat Solomon Passy.