This is the common name thread for production designer Massimo Antonello Geleng:
CLT:
"Audrey Bellows" is credited in the following 1 titles (4 profiles)
"Alexander M. Colby" is credited in the following 4 titles (6 profiles)
"Alexander Colby" is credited in the following 3 titles (5 profiles)
"Alex Colby" is credited in the following 7 titles (10 profiles)
"Antonello Geleng" is credited in the following 44 titles (110 profiles)
"Antony Geleng" is credited in the following 2 titles (2 profiles)
"M. Antonello Geleng" is credited in the following 4 titles (13 profiles)
"M.A. Geleng" is credited in the following 1 titles (1 profiles)
"M. A. Geleng" is credited in the following 1 titles (4 profiles)
"Massimo Antonello Geleng" is credited in the following 44 titles (178 profiles)
"Tony Geleng" is credited in the following 2 titles (2 profiles)
"Antonello Massimo Geleng" is credited in the following 2 titles (2 profiles)
"Tony Gelleng" is credited in the following 2 titles (2 profiles)

Audrey Bellows (1 confirmed):
Vendetta dal futuro (confirmed by Mad Rockatansky)

Alexander M. Colby (1 confirmed, 2 unconfirmed):
Impatto mortale
Cobra Mission
Thunder 2 (confirmed by Mad Rockatansky)

Alexander Colby (1 unconfirmed):
La casa 3

Alex Colby (2 unconfirmed, 1 invalid):
La casa 3
La casa 4
Thunder 2

Antonello Geleng (22 confirmed, 2 unconfirmed):
2019: After the Fall of New York / 2019 - Dopo la caduta di New York (confirmed by bigdaddyhorse)
Sleepless / No ho sonno (confirmed by northbloke)
Argento’s Dracula (confirmed by ninso4)
Scorpion with Two Tails / Assassinio al Cimitero Etrusco (confirmed by zwoti)
La guerra del ferro - Ironmaster (confirmed by zwoti)
The Card Player / Il cartaio (confirmed by northbloke, Mad Rockatansky)
Cemetery Man / Dellamorte Dellamore (confirmed by northbloke)
The Church / La chiesa (confirmed by northbloke)
Il Fantasma dell’opera (confirmed by northbloke, ninso4)
La solitudine dei numeri primi (confirmed by AiAustria)
Delirium: Photo of Gioia / Le Foto di Gioia (confirmed by zwoti)
Demons 3: The Ogre / La casa dell’orco (confirmed by zwoti)
Dial: Help / Minaccia d’amore (confirmed by Rutan)
Dinner with a Vampire / A cena col vampiro (confirmed by AiAustria)
Graveyard Disturbance / Una notte al cimitero (confirmed by zwoti)
Il generale Dalla Chiesa (confirmed by Mad Rockatansky)
Paolo VI - Il papa nella tempesta
Pinocchio
The Stendhal Syndrome / La sindrome di Stendhal (confirmed by northbloke)
Tex and the Lord of the Deep / Tex e il signore degli abissi (confirmed by Rutan)
Until Death / Fino alla morte (confirmed by Rutan)
Warrior of the Lost World / Il Giustiziere della terra perduta (confirmed by Rutan)
The Wax Mask / Maschera di cera (confirmed by Mad Rockatansky)
La poliziotta a New York (confirmed by Mad Rockatansky)

Antony Geleng (1 confirmed):
Shark: Rosso nell’oceano / Devil Fish (confirmed by Rutan)

M. Antonello Geleng (2 confirmed):
Contamination (confirmed by Rutan)
La Setta (confirmed by zwoti)

M.A. Geleng (1 confirmed, 1 invalid):
L’isola degli uomini pesce / Island of the Fishermen
Hercules (confirmed by Mad Rockatansky, zwoti)

M. A. Geleng (1 confirmed):
Hercules (confirmed by bigdaddyhorse)

Massimo Antonello Geleng (7 confirmed, 4 unconfirmed, 15 invalid):
Contamination
I sopravvissuti della città morta / The Ark of the Sun God
Scorpion with Two Tails / Assassinio al Cimitero Etrusco
The Black Cat / Gatto nero
Cannibal Holocaust (confirmed by northbloke)
The Card Player / Il Cartaio
Demons 3: The Ogre / La casa dell’orco
La casa sperduta nel parco / The House on the Edge of the Park (confirmed by Behemot)
The Church / La chiesa
The Sect / La setta
City of the Living Dead / Paura nella città dei morti viventi (confirmed by northbloke)
L’isola degli uomini pesce / Island of the Fishermen (confirmed by bigdaddyhorse)
Argento’s Dracula 3D
Il Fantasma dell’opera
Dellamorte Dellamore
La montagna del dio cannibale (confirmed by Mad Rockatansky)
Eaten Alive / Mangiati Vivi! (confirmed by zwoti)
Edda Ciano Mussolini
Enrico Mattei -L’uomo che guardava al futuro
Eternal
Il fiume del grande caimano
Delirium: Photo of Gioia / Le Foto di Gioia
The Mountain of the Cannibal God / La montagna del dio cannibale (confirmed by Behemot)
The Wax Mask / Maschera di cera
The Stendhal Syndrome / La sindrome di Stendhal
Graveyard Disturbance / Una notte al cimitero

Antonello Massimo Geleng (1 confirmed):
Big Alligator River / Il fiume del grande caimano (confirmed by bigdaddyhorse)

Tony Geleng (1 confirmed):
The Adventures of Hercules / Hercules II (confirmed by bigdaddyhorse)

Tony Gelleng (1 confirmed):
Le avventure dell'incredibile Ercole / Hercules II (confirmed by Mad Rockatansky)

Uccelli d'Italia (EAN 8-032807-038056) as Massimo Antonello Gelerg  Scenografo

New Alias!
Only for completeness of information

La guerra del ferro - Ironmaster – Antonello Geleng (Art Director)

La liceale nella classe dei ripetenti (1978) as Massimo Antonello Geleng Scenografia