Raja Temenggung of Muar[1] (also known by the title of Temenggong Paduka Tuan of Muar)[2] was a noble title used to refer to the family of Dato' Pasir Raja @ Sayyid Ja'afar bin Tun Muhammad Ali Al-'Aydarūs and his descendants, which ruled the Muar fief, which was a part of the Johor Empire from the middle of the seventeenth century onwards.