Kayadere (Kurdish: Befewe; Syriac: Beth-Awe)[a] is a village in the municipality and district of Ömerli, Mardin Province in Turkey.

[5] Beth-Awe (today called Kayadere) was historically inhabited by Syriac Orthodox Assyrians.

[7] The village was besieged for five days by Kurds in November 1895 during the Hamidian massacres.

[8] In 1914, Beth-Awe was inhabited by 500 Assyrians, according to the list presented to the Paris Peace Conference by the Assyro-Chaldean delegation.

[11] The village was one of the first to be affected by the Sayfo as it was attacked on 4 or 10 June 1915 by men led by Hussein Bakro and its population was slaughtered whilst the Syriac Orthodox priest was burned alive.