Hasdin Al-Bellal

Hasdin Al-Bellal was an egyptian individual having participated in the theft of the Scepter of Aset with the Templars in 1340. Al-Bellal was the man who inadvertently led Numa Al'Khamsin to Bachir Al-Djallil, who in turn unveiled to the Assassin the destination of the Templars thieves.

Reference

 * Assassin's Creed 4: Hawk