Wiki information Kammad:

Ibn al-Kammad
Astronomer, Author, Person, Deceased Person

Abu Jafar Ahmad ibn Yusuf ibn al‐Kammad was a Muslim astronomer born in Seville, Al-Andalus. He is known to have been educated in Cordoba by the students of Al-Zarqali. His works such as al Kawr ala al dawr, al Amad ala al abad, and al Muqtabas,...

The Kammadan
Musical Recording