Dulmatin (6 June 1970 – 9 March 2010) was a senior figure in the militant group Jemaah Islamiyah (JI) and one of the most wanted terrorists in Southeast Asia. He was also known as Amar Usmanan, Joko Pitoyo, Joko Pitono, Abdul Matin, Pitono, Muktarmar, Djoko, and Noval. He had a nickname "Genius". Dulmatin was a Javanese with 172 cm tall, weighing 70 kg, with a brown complexion. According to the Jakarta Globe when he was a young man he attended a religious boarding school run by the founder of the Jemaah Islamiyah, Abu Bakar Bashir.