The Saiyans
All the saiyans have names like vegetables
Vegeta-Vegetable Kakarot-Carrot Brolli-Brocolli Paragus-Asparagus Bardock-Burdock Radditz-Raddish Torrah-Tomato
Haven't figured out these ones yet Fasha- Borgos- Turles- Nappa-
The Son Family
I'll explain these ones individually
Goku-Sky
Goku was found in a spaceship that fell out of the sky. Gohan-Fried Rice
Fried Rice is the Son family's favourite meal Goten-Heaven
Goten was born while his father was in heaven Chi Chi-Breasts
Well. . .
The Breifs Family
Their names are all types of underwear
Dr. & Mrs. Breifs-Breifs Bulma-Bloomers Trunks-Trunks/Boxer Shorts Bura-Bra
The Red Ribbon Army
Their names are all colours which they can associated with
Colonel Silver
Silver has a silver pistol Officer Black
Officer Black is black Commander Red
Commander Red has red hair General White
General White has white hair Sergeant Murasaki Purple
Murasaki wears a purple gi General Blue
General Blue has blue eyes Captain Dark
Captain Dark has dark hair Captain Yellow
Captain Yellow has yellow fur Colonel Violet
Violet has violet-coloured hair.
Nameks
Piccolo and his children have names like musical instruments
Piccolo Tambourine Cymbal Piano
Some others . . .
Kami-God Piccolo-Satan Bibidi, Babidi, Buu-The spell the fairy godmother uses in Disney's Cinderella
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