Tarkhan Tayumurazovich Batirashvili; known by his nom de guerre Abu Omar al-Shishani ('Abu Omar the Chechen'); was a Georgian Kist (Chechen) jihadist who served as a commander for the Islamic State in Syria; and previously as a sergeant in the Georgian Army.

In 2013; Batirashvili joined the Islamic State and rapidly became a senior commander in the organization; directing a series of battles and ultimately earning a seat on ISIL's shura council.

The US Treasury Department added Batirashvili to its list of Specially Designated Global Terrorists on 24 September 2014; and seven months later the US government announced a reward up to US$5 million for information leading to his capture. Batirashvili was killed in July 2016 during fighting in the Iraqi city of Shirqat; south of Mosul; Iraq.