Akira Torriama is a funny guy. He made most of the names of his DB characters mean something (mainly a food). This is a list of what Dragonballs' characters' Japanese names mean. If you know of any I don't have listed, e-mail me.
Named after: Vegetables
Saiyan- anagram of Japanese word Yasai, which means vegetable.
jin- Japanese word for people. (Therefor Saiyajin= Vegetable people.)
Kakarot- Carrot
Raditz- Radish
Brolli- Broccoli
Nappa- Cabage
Turles- Lettuce
Paragas- Asparagus
Pottano- Potato
Toma- Tomato
Celipa- Parsley
Named after: Dairy products
Ginyu- Milk (We have the Ginyu Force- Milk squad)
Captain Ginyu- Captain milk
Burter- Butter
Guldo- Yogurt
Jeice- Cheese
Recoome- Cream
Named after: Slugs and snails
Namek- Namekuji (Japanese) slug
Ajissa (the trees grown on Namek)- Hydrangea
Dende- snail (slang)
Nail- Snail
Katattsu- snail
Cargo- Escargot
Named after: Clothing
Bulma- Bloomers (girls gym shorts)
Trunks- Trunks
Dr. Briefs- Briefs
Bra- Bra
Named after: Cold
Frieza- Freezer
King Cold- King cold
Coola- Cool
Saiyans (Saiyajin)
Ginyu Force
Namekians
Bulma's Family
Changelings