Ioannis Kolokotronis (Greek: Ιωάνης Κολοκοτρώνης; 1805–1868^[1]), or Gennaios Kolokotronis (Greek: Γενναίος Κολοκοτρώνης) as the other were calling him was a Greek warrior of the Greek War of Independence, general and Prime Minister of Greece. He was born at Stemnitsa, Arcadia, but he grew up at Zakynthos. He was a son of Theodoros Kolokotronis and his mother was Aikaterini Karousou (Greek: Αικατερίνη Καρούσου). He acquired the nickname "Gennaios" (meaning "brave") during the Greek War of Independence in which he fought valiantly despite his youth. He took part at the Siege of Tripolitsa, together with his father. 

During the civil wars he sided with his father. Kolokotronis served as the aide de camp of King Otto with the rank of Major General, and was appointed by Otto as his last Prime Minister at 1862. He died on May 23, 1868. He married the sister of Kitsos Tzavelas, Photini Tzavela and together they had 2 sons and 5 daughters.