Muslim Atayev (1974 – January 27, 2004), also known as Emir Sayfullah, was the founder of the Yarmuk Jamaat, which later became part of the Caucasus Front's Kabardino-Balkarian Sector in the Russian-held Caucasian Muslim state Kabardino-Balkaria of the Second Chechen War. Atayev was an ethnic Balkar and started his military career as a volunteer fighting in Chechnya.