Tun Muhammad bin Tun Ahmad, better known as Tun Sri Lanang,[1] was the Bendahara (Grand Vizier) of the royal Court of Johor Sultanate who lived between the 16th and 17th centuries.[1] He served under two Sultans of Johor, namely; Sultan Ali Jalla Abdul Jalil Shah II (1570–1597) and Sultan Alauddin Riayat Shah III (1597–1615) and also advisers to 3 Acheh sultans namely; Sultan Iskandar Muda (until 1636), Sultan Iskandar Thani (1636–1641) and Sultana Tajul Alam Safiatuddin Shah (1641–1675). He had two honorific titles throughout his lifetime; as the Bendahara of Johor, Bendahara Paduka Raja Tun Mohamad,[2] while he was given the title of Orang Kaya Dato' Bendahara Seri Paduka Tun Seberang after settling in Aceh.