Goku: The sky
Kakarot: A pun on carrot
Gohan: A type of rice dish
Goten: Heaven
Vegeta: A pun on vegetable
Trunks: Gym shorts for boys
Krillin: Chestnut
Yamcha: Dim sum(Chinese)
Tien: Fried rice
Chao-Zu: Pot Stickers
Mr.Satan: Um...satan?
Videl: Devil mixed up
Puar: Chinese tea
Oolong: A type of tea
Lunch: The time of eats
Pan: Bread
Piccolo: A flute

Freeza: Freezing
King Cold: Brrrr...
Cooler: A cooler
Captain Ginyu: Milk
Jase: A pun on cheese
Burter: Butter
Guldo: Yogurt
Recoom: A pun on cream
Cell: A cell