Fadir Nasser

Onyx Adams was a member of League of Assassins.

Biography
According to the Shadow Record, Onyx Adams joined the League of Assassins in 1764.

Behind-the-scenes

 * In the DC comics Fadir Nasser also known as White Ghost is a member of League of Assassins and a top secret agent of Ra's al Ghul, who had clashed with Azrael (Michael Lane), Red Robin and Batman.