Vijayalaya (c. 850-870 CE), the founder of the Chola empire, adopted the title 'Nar Kesari' (Lion of Men). This title reflected his prowess as a warrior and ruler. He revived the Chola dynasty after centuries of Pallava dominance. Rajendra Chola and Parantaka I were later Chola rulers with different titles, while Aditya I was Vijayalaya's son who expanded the kingdom.