So, someone uploaded a list with the names of character and Stands from JOJOVELLER (Romanized); this could count as "official", the list is the following:
Part One: Phantom Blood
- Jonathan Joestar
- Adams
- Bornnam
- Bruford
- Danny
- Dario Brando
- Dio Brando
- Dire
- Doobie
- Erina Pendleton
- Father Styx
- George Joestar I
- Jack the Ripper
- Jones
- Page
- Plant
- Poco
- Robert E. O. Speedwagon
- Tarkus
- Tonpetty
- Wang Chan
- William Anthonio Zeppeli
Part Two: Battle Tendency
- Joseph Joestar
- Bruto
- Caesar Anthonio Zeppeli
- Donovan
- Esidisi
- George Joestar II
- Kars
- Lisa Lisa
- Loggins
- Mario Zeppeli
- Mark
- Messina
- Rudol von Stroheim
- Santana
- Smokey Brown
- Straizo
- Suzi Q
- Wamuu
- Wired Beck
Part Three: Stardust Crusaders
- Jotaro Kujo (Star Platinum)
- Alessi (Sethan)
- Arabia Fats (Sun)
- Boingo (Tohth)
- Cameo (Judgement)
- Chaka (Anubis)
- Daniel J. D’Arby (Osiris)
- Devo the Cursed (Ebony Devil)
- Dio Brando (The World)
- Enya the Hag (Justice)
- Forever (Strength)
- Gray Fly (Tower of Gray)
- Hol Horse (Emperor)
- Holy Kujo
- Iggy (The Fool)
- Imposter Captain Tennille (Dark Blue Moon)
- J.Geil (Hanged Man)
- Jean Pierre Polnareff (Silver Chariot)
- Joseph Joestar (Hermit Purple)
- Kenny G (Tenore Sax)
- Khan (Anubis)
- Mannish Boy (Death Thirteen)
- Mariah (Bastet)
- Midler (High Priestess)
- Muhammad Avdol (Magician’s Red)
- N’Doul (Geb)
- Nena (Empress)
- Noriaki Kakyoin (Hierophant Green)
- Nukesaku
- Oingo (Khnum)
- Pet Shop (Horus)
- Roses
- Rubber Soul (Yellow Temperance)
- Sadao Kujo
- Steely Dan (Lovers)
- Telence T. D’Arby (Atum)
- Vanilla Ice (Cream)
- Wilson Phillips
- ZZ (Wheel of Fortune)
Part Four: Diamond is Unbreakable
- Josuke Higashikata (Crazy Diamond)
- Akemi
- Akira Otoishi (Red Hot Chili Pepper)
- Anjuro Katagiri (Aqua Necklace)
- Arnold
- Ayana Hirose
- Aya Tsuji (Cinderella)
- Gonta
- Hayato Kawajiri
- Keicho Nijimura (Bad Company)
- Ken Oyanagi (Boy II Man)
- Koichi Hirose (Echoes act 1, Echoes act 2, Echoes act 3)
- Kosaku Kawajiri
- Masazo Kinoto (Cheap Trick)
- Mikitaka Hazekura [Nu Mikitakazo Nshi] (Earth Wind and Fire)
- Okuyasu Nijimura (The Hand)
- Rats (Ratt)
- Reiko
- Reimi Sugimoto
- Rohan Kishibe (Heaven’s Door)
- Ryohei Higashikata
- Shigekiyo Yangu (Harvest)
- Shinobu Kawajiri
- Shizuka Joestar (Achtung Baby)
- Stray Cat [tama]
- Tamami Kobayashi (The Lock)
- Terunosuke Miyamoto (Enigma)
- Tomoko Higashikata
- Tonio Trussardi (Pearl Jam)
- Toshikazu Hazamada (Surface)
- Toyohiro Kanedaichi (Super Fly)
- Yoshie
- Yoshihiro Kira (Atom Heart Father)
- Yoshikage Kira (Killer Queen, Sheer Heart Attack, Killer Queen Bites the Dust)
- Yukako Yamagishi (Love Deluxe)
- Yuya Fungami (Highway Star)
Part Five: Vento Aureo
- Giorno Giovanna (Gold Experience, Gold Experience Requiem)
- Bruno Bucciarati (Sticky Fingers) NOTE: in another page it says Buccellati. Yes, really.
- Carne (Notorious B•I•G)
- Cioccolata (Green Day)
- Coco Jumbo (Mr. President)
- Diavolo (King Crimson)
- Formaggio (Little Feet)
- Gelato
- Ghiaccio (White Album)
- Guido Mista (Sex Pistols)
- Illuso (Man in the Mirror)
- Jean Pierre Polnareff (Silver Chariot, Chariot Requiem)
- Leone Abbacchio (Moody Blues)
- Luca
- Mario Zucchero (Soft Machine)
- Melone (Baby Face)
- Narancia Ghirga (Aerosmith)
- Pannacotta Fugo (Purple Haze)
- Pesci (Beach Boy)
- Polpo (Black Sabbath)
- Prosciutto (The Grateful Dead)
- Risotto Nero (Metallica)
- Sale (Kraft Work)
- Scolippi (Rolling Stones)
- Sorbet
- Squalo (Clash)
- Tizzano (Talking Head)
- Trish Una (Spice Girl)
- Vinegar Doppio
Part Six: Stone Ocean
- Jolyne Cujoh (Stone Free)
- Atroe
- Charlotte
- D an G (Yo-Yo Ma)
- Donatello Versus (Under World)
- Emporio Alnino (Burning Down the House)
- Enrico Pucci (Whitesnake, C-Moon, Made in Heaven)
- Ermes Costello (Kiss)
- Foo Fighters (Foo Fighters)
- Gloria Costello
- Guccio (Survivor)
- Gwess (Goo Goo Dolls)
- Johngalli A. (Manhattan Transfer)
- Kenzou (Dragon’s Dream)
- Lang Rangler (Jumpin’ Jack Flash)
- Loccobarocco
- Miraschon (Marilyn Manson)
- Miuccia Miuller (Jail House Lock)
- Narciso Anasui (Diver Down)
- Perla Pucci
- Rikiel (Sky High)
- Romeo Jisso
- Savage Garden
- Sonny Likir
- Sports Maxx (Limp Bizkit)
- The Green Baby (Green, Green Grass of Home)
- Thunder McQueen (Highway to Hell)
- Ungalo (Bohemian Rhapsody)
- Viviano Westwood (Planet Waves)
- Weather Report (Weather Report)
Part Seven: Steel Ball Run
- Johnny Joestar [Jonathan Joestar] (Tusk Act 1, Tusk Act 2, Tusk Act 3, Tusk Act 4)
- Adam Pendelton
- Andre Boomboom (Tomb of the Boom 1 2 3)
- Axl RO (Civil War)
- Baba Yaga
- Benjamin Boomboom (Tomb of the Boom 1 2 3)
- Blackmore (Catch the Rainbow)
- Captain Valentine
- D-I-S-C-O (Chocolate Disco)
- Danny
- Diego Brando
- Dot Han
- Dr. Ferdinand (Scary Monsters)
- Eleven Men (Tatoo You!)
- Fritz von Stroheim
- Funny Valentine (Dirty Deeds Done Dirt Cheap, D4C Love Train)
- Gaucho
- George Joestar
- Gregorio Zeppeli
- Gyro Zeppeli [Julius Caesar Zeppeli] (Ball Breaker)
- Hot Pants (Cream Starter)
- L.A. Boomboom (Tomb of the Boom 1 2 3)
- Lucy Steel (Ticket to Ride)
- Magent Magent (20th Century Boy)
- Marco
- Mark Becker
- Mountain Tim (Oh! Lonesome Me)
- Mrs Robinson
- Nicholas Joestar
- Norisuke Higashikata
- Oyecomova (Boku no Rhythm wo Kiitekure)
- Paul Lukather
- Pocoloco (Hey Ya!)
- Pork Pie Hat Kid (Wired)
- Ringo Roadagain (Mandom)
- Sandman (In A Silent Way)
- Scarlet Valentine
- Sloop John B
- Steven Steel
- Sugar Mountain
- Urmd Avdul
- Wekapipo
Part Eight: JoJolion
- Josuke Higashikata (Soft & Wet)
- Daiya Higashikata (California King Bed)
- George Joestar III
- Hato Higashikata
- Holly Joestar-Kira
- Joshu Higashikata
- Kyo Nijimura (Born This Way)
- Mitsuba Higashikata
- Nijimura’s Father
- Norisuke Higashikata IV
- Ojiro Sasame (Fun Fun Fun)
- Rina Joestar
- Suzuyo Hirose
- Tsurugi Higashikata
- Yasuho Hirose (Paisley Park)
Spinoff Works
- Dolce
- Nanase Fujikura
- Nizaemon Yamamura
Characters whose names couldn't be place (many of these may be spin-off characters, SBR racers, etc...)
- David Hagen
- Mark Watkin
- Gaucher
- Noguchi
- Yamaoka
- Kyoka Izumi
- Minoru Kaigamori
- Gunpei Kamafusa
- Ikkyu
- Shuichi
- Naoko Osato
- Masago Ayashi
SOURCE: Shizukajoestar tumblr/FYJBBA tumblr (Thanks to this people for being so gentle)