In the "Dragon Ball" franchise, what is the name of Goku's brother?

In the Dragon Ball franchise, Goku's brother is named Raditz. He is introduced as a Saiyan warrior and older brother to Goku. Raditz arrives on Earth to recruit Goku and inform him of his Saiyan heritage. However, his true purpose is to convince Goku to join him in his mission to conquer planets. This conflict leads to an epic battle between Raditz, Goku, and his allies, setting the stage for the larger story arcs in the Dragon Ball series.