Son Family

Goku-The ku means sky (Go-means 5)(jap)
Chi Chi-slang for breasts 
Goten-The ten means heaven (jap)
[things in common: Sky and Heaven]
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Gohan- rice (jap)
Pan- bread (spn)
[things in common: Food]

 Capsule Corp.

Buruma(Bulma)- bloomers (eng)
Dokuta Bureefusu(Dr.Briefs)- briefs (tighty-whities)(eng)
Torunkusa(Trunks)- trunks (like boxers)(eng)
Bura- bra (eng)
[Things in common: underwear]

 Saiyajins 

Kakaroto (Kakarott)- carrot (eng)
Bajeta(Vegeta)- vegetable (eng)
Nappa- a kind of japanese cabbage (jap)
Raditsu(Radditz)- raddish (eng)
Burori(Brolly)- broccoli (eng)
Paragasa(Paragus)- asparragus
[Things in common: vegetables]

 Sataan Family

Meesuta Sataan or Mr. Satan(Hurcule)- satan or in english herculese(eng)
Bideru (Videl)- videl is devil scrambled (eng)
[things in common: devilish]

 Namics

Pikoro(Piccolo)- piccolo (eng)
Piano-Piano(eng)
Tamuborinu- Tamborine (eng)
Tsuno- Horn(jap)
Durumu- Drum(eng)
Simboru- Cymbol(eng)
[things in common: musical instruments]
----------------------
Naru (Nail)- Snail (eng)
Dende- Denden Mushi (jap)
Karugo(Kargo)- escargo (eng)
[things in common: from snails]
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Saichuru (Guru)- master (jap)

 Good Guys

Choutsu- dumplings (jap)
Tienshinhan- Fired rice (jap)
Kuririn- Chestnuts (chn)
Oorongu(Oolong)- Chinese fortune tea (chn)
Puaru- another kind of tea (chn)
Yamucha (Yamcha)- Dim Sam (jap)
(Gohan and Pan could fit this catagory)
[Things in common: Foods]

 Bad guys

Pirafu(Pilaf)- rice dish
Gurodu(Guldo)- yogurt (jap)
Jeesu(Jaise)- Cheese (eng)
Bata- butter (eng)
Gyunyuu(Ginyu)- milk (jap)
Rikumu(Rikoom)- cream
Pomero(Zarbon)- pomelo (jap)
[things in common: Food]
----------------------------
Fureeza(Freeza)- Freezer (eng)
Kura(Kooler)- Cooler (eng)
Kingu Korodu(king kold)- Cold(eng)
[things in common: Being cold]
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Ceru(cell)- Made from cells (eng)
Buu- Made by a wizard...bippidy boppidy boo!! (eng)
[things in common: From how they're made]