What is Kakarotto?

Kakarotto, also known as "Goku" in the anime Dragonball Z, created by Akira Toriyama. 'Kakarot' is Goku's real name on his home planet of Vegeta-sei, before he came to earth and was given his new name. The'to' is added for formality. The only one who calls him by his Saiya-jin name is Vegeta.