Lady Jayne Killer: Joao Fernandes
The Glow: João Fernandes

Since someone recently replaced the cross link with the well documented BY for Juan Fernández (1959) with Juan Fernandez (as credited) and stated to follow the CLT - which imho is something in between encouraged and peculiar - here the Thread, which tries to unravel all the Juan Fernandez' out there. Common name threads are mentioned where applicable.

João Fernandes (1939): Cinematographer; aka. John Fern, John Fernan, J. Fernandes, Joao Fernandes, Joáo Fernandes, Jõao Fernandes, Joad Fernandez, Joao Fernandez, Juan Fernandez, Juan Fernández, Harry Flecks, Harry Flex, Juan, Raoul Lomas, Raul Lomas, Peter Mann, Al Spencer

Born July 21st, 1939 in Brazil
Known for: Children of the Corn, Friday the 13th: The Final Chapter, Missing in Action Part 1 & 3, Walker, Texas Ranger, Deep Throat and many more movies, TV material and adult films.
Documentation: IMDB as João Fernandes (II), Common Name Thread

• The Amazing Transplant
• Betrayal (Lady Jayne Killer)
• Betrayal
• Lady Jayne Killer
• Braddock: Missing in Action III
• Braddock: Missing in Action III
• Children of the Corn
• Conversation with God
• Conversations With God
• Deadly Weapons
• Deep Red / Evolution"s Child
• Deep Throat
• Delta Force 2
• The Devil in Miss Jones
• The diary of Ellen Rimbauer
• Expose Me, Lovely
• Forest Warrior
• Forest Warrior
• Friday The 13th Part 4 - The Final Chapter
• Friday the 13th Part 4: The Final Chapter
• Full contact 2: Quadra Vision
• Gideon
• Gideon
• Girls & Gadgets Double Feature: Electronic Lover / The Spy Who Came: Special Edition
• The Glow
• HellBound
• HellBound
• Hercules In New York
• The Hitman
• The Hitman
• Hollywood Vice Squad
• In the Blink of an Eye
• In The Blink Of An Eye
• Invasion U.S.A.
• Invasion U.S.A.
• Legacy of Satan / Blood Song
• Let Me Die a Woman
• Missing in Action
• Missing in Action
• Missing in action 3
• The Nesting
• One Man"s Hero
• Overkill
• The Prowler
• Red Scorpion
• Red Scorpion
• The Rosebud Beach Hotel
• Same Time Every Year
• Sex Boat
• Sidekicks
• Sprung
• Stacy"s Knights
• Stealing Candy
• The Story of Joanna
• Take Off
• The Prowler
• Top Dog
• Walker Texas Ranger: The Fifth Season
• Walker Texas Ranger: The Sixth Season
• Walker, Texas Ranger: The Fourth Season

Juan Fernández (1956): Actor; aka. Juan de Jesus Fernández de Alarcon, Juan Fernandez

Born December 13th, 1956 in Santo Domingo, Dominican Republic
Known for: The Collector, Necromicon, A Man Apart (Extreme Rage), Salvador, El Gallo and many other titles including tons of guest appearances in TV shows.
Documentation: Wikipedia, IMDB as Juan Fernández (I), Common Name Thread

• "Crocodile" Dundee II
• Beverly Hills 90210: The Eighth Season Disc 1
• Bulletproof / Bamboo Gods and Iron Men
• Cat Chaser
• Cheyenne
• The Collector
• CSI: Miami: The Fifth Season: Disc 4
• Diario de un skin
• Executive Decision
• Executive Decision
• Extralarge: Deadly Object
• Fear City
• Fear City
• Fire on the Amazon
• Fire on the Amazon
• The Fugitive: The Chase Continues
• Hill Street Blues: Season Seven: Disc 5
• In Hell
• In Hell
• Iron Eagle III: Aces
• Kinjite: Forbidden Subjects
• Kinjite: Forbidden Subjects
• L.A. Takedown
• L.A. Takedown
• Liquid Dreams
• The Lost City
• The Lost City
• Mad Dog Time
• A Man Apart
• A Man Apart
• Miami Vice: Season Five: Disc 2
• Nails
• Necronomicon
• Saints and Sinners
• Salomè
• Salvador
• Salvador
• SeaQuest DSV: Season Two Disc 8
• A Show of Force
• La soga
• Sparkling Cyanide
• Sparkling Cyanide: Agatha Christie Collection
• Tropico de Sangre
• Uncommon Valor
• Uncommon Valor
• Walker Texas Ranger: The Second Season
• Walker Texas Ranger: The Third Season
• White Tides
• Wildfire
• Wildfire

Juan Fernández (????): Sound; aka. Juan Fernandez
Known for: Sinatra, La rebelión de los pájaros, Asalto al Banco Central
Documentation: IMDB as Juan Fernández (V)

• Sinatra

Juan Fernández (????): Actor; aka. Juan Fernandez, Joan Fernández
Known for: Valdez Is Coming, La Plaza del Diamante, El jovencito Drácula, Hic Digitur Die and many more
Documentation: IMDB as Juan Fernández (VII), Common Name Thread

• El jovencito Drácula
• La Plaza del Diamante
• Valdez Is Coming

Juan Fernández (????): Actor, Voice Actor; aka. Juan Fernández Mejías, Juan Fernandez

Known for: La mala Educación (Bad Education), Hable con ella (Talk to Her), Lucía y el sexo (Sex and Lucia), La caja 507 (Box 507), Tierra de lobos and many other titles including many Spanish TV shows.
Documentation: Homepage, Wikipedia, IMDB as Juan Fernández (XIII), Common Name Thread
Remark: Spanish voice for Alan Rickman, Sean Connery, Danny DeVito, Dustin Hoffman and many more.

• Aladdin: Edición Especial 2 Discos
• El alquimista impaciente
• La caja 507
• Camara oscura
• Cámara oscura
• El corazón del guerrero
• Eres mi héroe
• Fausto 5.0
• Fausto 5.0
• Gitano
• Hable con ella
• Home on the Range
• El Lobo
• Lucía y el sexo
• La Mala Educación
• Miguel y William
• Over the Hedge
• Padre coraje
• The Prince of Egypt
• El refugio del mal
• Los Serrano:Segunda Temporada
• Shrek
• Shrek 2
• Solas

Juan Fernández (????): Actor

Known for: Liverpool
Documentation: IMDB as Juan Fernández (XVI)

• Liverpool

Juan Fernandez (1972): Actor

Born June 23rd, 1972 in Philadelphia, Pennsylvania, USA
Known for: Tartarus, Zombies by Design and Suburban Sasquatch
Documentation: IMDB as Juan Fernandez (II)

• Tartarus (Catacomb of Creepshows Disc 6)

Juan M. Fernández (????): Actor; aka. Juan M. Fernandez, Juan Fernandez
Known for: Nightcrawler, Unstoppable, Evan Almighty, Stockholm, Pensylvania and CSI Miami
Documentation: IMDB as Juan M. Fernández (II), Common Name Thread

• CSI: Miami: Complete Season 08: Disc 03
• CSI: Miami: Complete Season 08: Disc 06
• Eleventh Hour: The Complete Series: 3
• Evan Almighty
• Nightcrawler
• Unstoppable
• Unstoppable

Juan Miguel Fernández (????): Actor, Stunts; aka. Juan M. Fernández, Juanmi Fernández
Known for: Torrente 2: Misión en Marbella, Torrente 3: El protector and Isi & Disi, alto voltaje
Documentation: IMDB as Juan Miguel Fernández

• Torrente 2: Misión en Marbella
• Torrente 3: El protector
• A Menina da Rádio
• Les Indes galantes
• King Arthur - Henry Purcell

For the following titles in our CLT - which belong to some kind of Juan Fernandez, I couldn't find any correlation.
Any help appreciated.

• La biblia negra
• Buena Vista Social Club
• Empire Records
• To the Other Side

Remarks:
Please note that most of the given birth years in this thread are not proven to be necessary nor they are documented or approved.
Please note that there are more Juão Fernandez' - and variants - out there. I only listed the ones interfering with the Juan Fernandez' in this thread...
I can provide only very little documentation, since all these Persons are Latin American or Spanish and I can't speak Spanish nor Portuguese. Maybe someone can halp me improving this thread...