Dr. Yona Kosashvili (born July 3, 1970) is a Georgian-born Israeli chess Grandmaster and surgeon. He was born in Tbilisi, Georgia, moved to Israel as a child. Yona Kosashvili is one of the few people in the world to have earned the titles MD and GM. He is an orthopedic surgeon, specializing in a variety of procedures including arthroscopy and total joint replacement. Dr. Kosashvili is actively involved in academics through his role as Clinical Instructor of Orthopedic Surgery at the University of Tel Aviv.

Although he never played chess professionally, he holds the title of International Chess Grandmaster. In 1995 he was ranked 34th in the world. In 1999 he married International Master Sofia Polgar, and they have two children: Alon and Yoav. Other famous chess players in the family are include sister-in-law's and former female world champion Susan Polgar and best known female chess player of all time Judit Polgar.

Dr. Kosashvili also published scientific articles, on orthopedic subjects, that are on the web. He works in the Orthopedic Department of Rabin Medical Center, Beilinson Campus, Israel, as an orthopedic surgeon.

Chess coaching and management

In addition to actively competing, Yona was the Israeli junior team captain and trainer in 1993. One of his students won the Under 14 World Junior Championship in 1992, while another student won second place in the Under 12 World Junior Championship.

Before beginning his army service, he published a book for chess trainers that was adopted by the Israeli Chess Federation as its official trainers guide. In 1995, he was the managing director of the European Junior Chess Championship and International Chess Festival.