Wareru (Mon: ဝါရေဝ်ရောဝ်, Burmese: ဝါရီရူး, Burmese pronunciation: [wàɹíjú]; also known as Wagaru; 20 March 1253 – c. 14 January 1307) was the founder of the Martaban Kingdom, located in present-day Myanmar (Burma). By using both diplomatic and military skills, he successfully carved out a Mon-speaking polity in Lower Burma, during the collapse of the Pagan Empire (Bagan Empire) in the 1280s. Wareru was assassinated in 1307 but his line ruled the kingdom until its fall in the mid-16th century.