Vegeta's full name is likely just Vegeta; he doesn't appear to have a last name.
Explanation
In the Dragon Ball universe, it is common for characters to be referred to by a single name. Last names are not generally used. While the Saiyan prince is sometimes referred to as "Vegeta the Fourth," this appears to indicate his lineage and royal status rather than a traditional last name. "Vegeta" functions as both his given name and his identifier.
Why Vegeta Likely Doesn't Have a Last Name
- Cultural Norm: The Dragon Ball universe doesn't consistently utilize last names for its characters.
- Royal Lineage: The use of "Vegeta the Fourth" signifies his place within the royal Saiyan bloodline. This title serves as a unique identifier akin to a royal title rather than a typical last name.
- Simplicity: Akira Toriyama, the creator of Dragon Ball, often favored simple and direct character naming conventions.
