Who was the last ruler of the Mauryan Kingdom?

Brihadratha was the last ruler of the Mauryan Empire. He was assassinated by his commander-in-chief Pushyamitra Shunga in 185 BCE, which led to the establishment of the Shunga Dynasty. Brihadratha was a weak ruler, and his assassination marked the end of the Mauryan Empire that had begun with Chandragupta Maurya. Ashoka was a famous Mauryan emperor but not the last; Kunal and Tivara were other Mauryan rulers but not the final one.