Gohan was Goku's son, whose name was given in honor of his adoptive great - grandfather. When he was young, his mother, Jiji, wanted him to be called Einstein, but he did not like the name expressed in tears, which Kyoma saw when she heard Gohan's name laughed, and so he was called.

Ultimate skill.

Makouhou
Renzokumakouhou
Kamehameha
Gekiretsumasenkou
Masenkou
Bakusaimaden
Choumaden