Ma'Mun

Ma'Mun was a shipping agent in Athens.

Biography
Upon the Assassin Ezio Auditore's arrival in Athens, he was immediately sought out by Ma'Mun. Ma'Mun, having heard of Ezio's bravery during his travels to Athens, showered the Assassin with gifts. He also urged Ezio to stay in Athens a while longer, an offer Ezio was forced to accept due to strong storms boiling up along the route he had hoped to take.

As soon as the storms had settled, Ma'Mun made all the arrangements that were needed for Ezio to travel onward to Crete, from where he could continue his journey to Cyprus

Source

 * Assassin's Creed: Revelations (novel)