David ibn Merwan al-Mukkamas

David Abu Sulayman ibn Marwan al-Muqqamaṣ al-Raqqi was a philosopher and controversialist, the author of an early Jewish philosophical work of the Middle Ages. He was a native of Raqqa, Mesopotamia, hence his laqab. Abraham Harkavy derives his nisba from the Arabic root qammaṣ "to leap," interpreting it as referring to his asserted change of faith. The name is written אלקומסי al-qumisi in Masudi's Al-Tanbih, in a Karaite Jewish commentary to Leviticus and a manuscript copy of Yefet ben Ali's commentary to the same book, and is perhaps a derivative from the city of Qumis, Iran. Another Karaite bears the name Daniel al-Kumisi, and in al-Hiti's chronicle, this name is also spelled with a tsade.