ALTERNATE NAMING
We try to put any character that appears for more than a few episodes in here, someone who plays SOME sort of importance in the show. If they're not here, we either forgot them or didn't think they really needed to be here. This list only covers Dragon Ball Z.
Characters are listed in alphabetical order by English dub name. I don't watch the dub though, so some of the names used in the left column may not necessarily be the name actually used in the dub. My mistake, if that's the case. Names in the right column are alternate spellings and variations. Not all of these variations are necessarily correct, but that doesn't stop people from using them, so I've listed them here anyway. On a related note, it's impossible that there are even more mangled variations out there that I've never seen, so I can't guarantee the completeness of this list.
A word in parentheses is optional; sometimes it's used, sometimes it's not.
PROTAGONISTS
Bulla -- Bra
Bulma -- Bloomer, Buruma
Chiaotzu -- Chao-Su, Chaouzu
Chichi -- Chi-Chi (note: her surname is "Son" by
marriage, but it is never used with her name)
Dende -- (no alternate spellings)
Dr. Briefs -- Dr. Brief (note: Dr. Brief is the correct name
according to Daizenshuu)
Elder Kai -- Dai Kaioushin, Rou Kaioushin
Gogeta -- Gogita, Gojita
Gohan -- (no alternate spellings; sometimes includes the surname
"Son")
Goku -- (Son) Gokou, Gokuh, Gokuu
Goten -- (no alternate spellings; sometimes uses the surname
"Son")
Gotenks -- (no alternate spellings)
Hercule -- Mr. Satan
Icarus -- Haiya Dragon, Higher Dragon
Kakarot -- Kakarotto
Kami -- God
Kibito -- Kibit
King Kai -- Kaio, Kaiou, Kaioh
Korin -- Karin
Krillin -- Klilyn, Kulilin, Kuririn
Master Roshi -- Kamesennin, Muten Roshi, Turtle Hermit
Mr. Popo -- (no alternate spellings)
Nail -- Neil, Neiru
Oolong -- (no alternate spellings)
Ox King -- Gyuu Maou
Pan -- (no alternate spellings)
Piccolo -- (no alternate spellings)
Pikkon -- Paikuhan
Pwar -- Puar, Puaru
Supreme Kai -- Kai-Oo-Shin, Kaioshin, Kaioushin
Tapion -- (no alternate spellings)
Tien (Shinhan) -- Ten, Tenshinhan
Trunks -- Torankusu
Vegeta -- Bejita, Vegita, Vejita
Vegito -- Bejitto, Vegetto, Vegit
Videl -- Bideru
Yajirobe -- Yajirobei
Yamcha -- Yamucha
ANTAGONISTS
Android -- Artificial Human, Cyborg, Jinzouningen, Robot
Android 16 -- Juurokugou, Number 16
Android 17 -- Juunanagou, Number 17
Android 18 -- Juuhachigou, Number 18
Android 19 -- Juukyugou, Number 19
Android 20 -- Nijuugou, Number 20
Babidi -- (no alternate spellings)
Bibidi -- (no alternate spellings)
Bojack -- Bojak
Broly -- Brolli, Brolly, Burori
Burter -- Baata, Butta
Buu -- Boo
Cell -- (no alternate spellings)
Cell Jr. -- (no alternate spellings)
Cooler -- Coola, Koola, Kooler
Dabura -- Doubler
Dodoria -- (no alternate spellings)
Dr. Gero -- (no alternate spellings)
Dr. Wheelo -- Dr. Willow
Frieza -- Freeza, Freezer, Furiiza
Garlic Jr. -- (no alternate spellings)
Ginyu -- (no alternate spellings)
Guldo -- Ghurd, Gurudo
Hildegarn -- (no alternate spellings)
Janenba -- Janemba
Jeice -- Jees, Jhees, Jiisu
King Cold -- King Kold
Kochin -- (no alternate spellings)
Nappa -- Napa
Paragas -- (no alternate spellings)
Raditz -- Raditsu
Recoome -- ReaCoom, Reacum, Rikum, Rikumu
Slug -- (no alternate spellings)
Turles -- Tales, Taurus
Zarbon -- Zaabon
PLACES AND RACES
HFIL -- Hell
Namek -- Nameck, Nameku, Nameksei, etc.
Namekian -- Namekseijin
Other Dimension / Spirit Realm -- Afterlife, Anoyo, Heaven/Hell,
Other World
Saiyan -- Saiya-jin
Vegeta -- Bejita, Vegita, Vejita
Yardratt -- Yardratt, Yardrat, Yardratto
Yardrattian -- Yardratto-jin
ATTACKS, TECHNIQUES, AND POWERUPS
Destructo Disk -- Kienzan
Flight -- Buku Jutsu, Levitation
Instant Transmission -- Instantaneous Movement, Shunkan Idou
Kaio-ken -- Kaioh-ken, Kaiou-ken
Masenko -- Masenkou
Solar Flare -- Taiyo-ken
Special Beam Cannon -- Makankousappo
Spirit Bomb -- Genki Dama
Super Saiyan -- Super Saiya-jin