A Sufi poet of Khwarazm, the most renowned khalifa of Ahmad Yasawi among the Turks. As a child his manners during Qur'an study caught Yasawi's attention; he became his disciple at fifteen and is counted his third khalifa in the hagiographic tradition. Licensed to guide, he taught in Khwarazm and settled where his camel knelt — a town that took the name Baqirghan. He married Anbar Ana, daughter of Bughra Khan, and had sons Muhammad, Mahmud and Hubbi. His poems, carrying Yasawi's hikmat tradition in plain popular Turkic, were read across Central Asia for centuries and gathered in the Baqirghan Book; the Book of the End Times and the Book of Lady Maryam are also attributed to him. He died in 582/1186. His grave is in Karakalpakstan, its exact site disputed among sources (TDV: Aqqurghan near Kungrad; others point near Mo'ynoq — legend holds the grave lay forty years beneath the Amu Darya). After his death his widow Anbar Ana married Zangi Ata, the next link of the chain. (Sources: TDV Encyclopedia of Islam "Hakîm Ata"; Önal Kaya, HÜTAD 2008; Dictionary of Names in Turkish Literature.)