What is "nainawaz"

Nainawaz ( Pashto/ Dari:نينواز) (also known as Ustad Nainawaz), born Fazel Ahmad Zekrya, is an Afghan artist, poet, and composer. He was one of the nine sons of the politician, poet, and writer Sardar Haji Faiz Muhammad Khan Zikeria from the Barakzai ruling family. Nainawaz has one son, Amir Khisrow Zekrya, and one daughter Sahar Zekrya Aman, married in 1985 to Ehsan Aman a singer from Helmand Province son of famous engineer Muhammad Aman. He was also the mentor and teacher of Ahmad Zahir, the well-known Afghan singer.