 "c." 1953—1920 BCE by the short chronology) was the founder of the Dynasty of Isin.Ishbi-Erra of the First Dynasty of Isin was preceded by Ibbi-Sin of the Third Dynasty of Ur in ancient Lower Mesopotamia, and then succeeded by Šu-ilišu.According to the Weld-Blundell Prism, Ishbi-Erra reigned for 33 years and this is corroborated by the number of his extant year-names.