Vegeta Jr.

ベジータジュニア

Vegeta Jr. is a descendant of Vegeta, appearing briefly at the end of Dragon Ball GT. He resembles Vegeta in both name and attitude. He competes in the Tenka-ichi Budokai against Son Goku's great-great-grandson, Son Goku Jr.
He is either the great-great-grandson or great-grandson of Vegeta and Bulma. He enters a tournament, and his opponent is Son Goku Jr. Upon first seeing Goku Jr., Vegeta Jr. says: "Hey punk, are those rags you're wearing?" He proves to be just like Vegeta. The two competitors are evenly matched. Vegeta Jr. lands and goes Super Saiyan; when he sees Goku Jr. do the same, he says, "I didn't know we both could go blonde," which suggests they do not know the actual name for the form.
Note that there is some doubt regarding his lineage: he could be descended from either Trunks or Bra, with little evidence providing a substantial case for either. It seems more logical to assume, based on his mother's hair color and the ignorance of the name of Super Saiyan, that he is Bra's grandson, and not Trunks' grandson.