He's of Libyan descent, but now plies his trade in Waziristan. In addition to various variations of Masli, he's also using variants of Darnavi as a last name:
AL-MASLI, 'Abd-al-Hamid (a.k.a. AL-DARNAVI, Hamza; a.k.a. AL-DARNAWI, Abu-Hamzah; a.k.a. AL-DARNAWI, Hamza; a.k.a. AL-DARNAWI, Hamzah; a.k.a. AL-MASLI, 'Abd al-Hamid Muhammad 'Abd al-Hamid; a.k.a. DARNAVI, Hamza; a.k.a. DARNAWI, Abdullah; a.k.a. DARNAWI, Hamza; a.k.a. DARNAWI, Hamzah; a.k.a. DIRNAWI, Hamzah; a.k.a. MASLI, Hamid; a.k.a. MUSALLI, 'Abd-al-Hamid), Waziristan, Federally Administered Tribal Areas, Pakistan; DOB 1976; POB Darnah, Libya; alt. POB Danar, Libya; nationality Libya (individual) [SDGT].