Name Puns
Heres a section telling you where they got the names for characters in DBZ.  Some of these are preatty funny, so I hope you enjoy.

Humans:

Bulma- Bloomers
Chi Chi- Breasts
ChaoZu- Pot Stickers
Dr. Briefs- Breifs/Underwear
Jackie Chun- Jackie Chan
Karin- Quiche
Krillin- Chestnut
Lunch- Lunch
Marron- Chestnut Paste
Master Roshi- Turtle Master
Oolong- Amber Tea
Pilaf- Rice Dish
Puar- Type of Tea
Tien- Fried Rice
Videl- Lerrers re-arranged make "Devil"
Yamcha- Dim sum
Yajirobe- Spin Toy

Saiyajins

Bardock- Roots Vegetable
Bra- Woman's Bra
Brolli- Broccoli
Gohan- Rice or Meal
Goten- "Ten" means sky
Kakrrot- Carrot
Nappa- Cabbage
Pan- Bread
Paragus- Asparagus
Raditz- Radish
Trunks- Boys Gym Shorts
Turles- Tales
Vegeta- Vegetable

Namekians

Cymbal- A Cymbal
Dende- "Denden-mushi" in Japanese
Drum- A drum
Kargo- Escargo
Nail- Snail
Piano- A piano
Piccolo- A piccolo
Tambourines- A tanbourine
Tsuno- A horn

Frieza and Henchmen

Burter- Butter
Dondoria- A type of Fruit
Frieza- Freezing
Ginyu- Milk
Guldo- Yogurt
Jeice- Cheese
King Kold- Cold
Kooler- Cooler
Kul- Kiwi Fruit
Recoom- Cream

Others

Bidi-dee, Badi-dee & Buu- The chants said by the fairly god Mother
Cell- A Biological Cell
Mr. Satan- The Devil/Satan
Shenron/Shenlong- Godly Dragon
Kaiou-sama- Mr. World King
Kaioushin- God of the World Kings
Saiyan- Vegetable People
Namek- Slug