Goten's father is Gokou,
and has an older brother named Gohan.
We don't see much of Son Goten during the Dragon Ball and Dragon Ball Z sequel.
Apparently when Goten and Chibi
Trunks first appeared, it was already near the start of the Majin Era. Goten
has supernatural power just like the rest of the Saiyan, however, Goten is an
exception. Goten reached to the Super
Saiyan level without pushing himself to the limit like what Gohan and Gokou
had to go through. When Gohan was training with Goten, Gohan asked Goten if it's
possible for him to become a Super Saiyan. Goten just gave it a try, and without
trouble, he transformed into a Super Saiyan.