Bardock

Gokuu's and Raditz's father (we know nothing about their mother). Many years aho about the same time that SonGokuu was send to Earth, his father and other Saiya-jin fought against Freeza (Freeza was afraid of the power of the Saiyans ), like most of the Saiyans he was killed by Freeza (this fight motivated the destruction of the Saiyan-jin planet: Vejiita)- so after this, the only remaining pure Saiyans are: SonGokuu, Raditz (now dead), Nappa (also dead) and Vejiita.