Baha'uddin 'Ali ibn Ahmad ibn ad-Dayf, also known as Al-Muqtana Baha'uddin, Baha'uddin al-Muqtana, Bahā'a ad-Dīn, Bahā'a ad-Dīn, Ali ibn Ahmad, Baha' al-Din, Ali ibn ad-Dayf, Ali b ad-Tai or Baha'u d-Din as-Samuqi (born 979 – died 1043 CE) was an 11th-century Ismaili, and founding leader of the Druze. He was born in a small village called Sammuqa near Aleppo in Syria and belonged to the Arab tribe of Tayy.[1][2]