Yusuf ibn Haydara al-Rakhi

Abu'l-Hajjaj Yusuf ibn Haydara al-Rakhkhi — named for al-Rakh, a district of Nishapur — shaykh of medicine in Syria, one of those at whom knowledge of the art ended. He came to Damascus with his father Haydara the oculist in 555 and kept constant study under al-Muhadhdhab ibn al-Naqqash, who made his name; he became one of Salah al-Din's physicians, his days lengthened, and the city's physicians became his pupils — among them al-Muhadhdhab al-Dakhwar. ¹