Trying to find out if André Morell or Andre Morell is the common name.
"André Morell " is credited in the following 69 titles (221 profiles):
"Andre Morell " is credited in the following 30 titles (97 profiles):

André Morell, 5 confirmed
The Adventurer (Confirmed by T!M)
Ben Hur (Confirmed)
The Man Who Never Was (Confirmed by railroaded)
Paris Holiday (Confirmed by mdnitoil)
The Professionals (Confirmed by T!M)

Andre Morell, 18 confirmed
10 Rillington Place (Confirmed by Sidrat)
Barry Lyndon (Confirmed by Kluge)
Behemoth: The Sea Monster (Confirmed)
The Bridge on the River Kwai (Confirmed)
Danger Man (Secret Agent) (Confirmed)
The First Great Train Robbery (Confirmed)
His Majesty O’Keefe (Confirmed by mdnitoil)
The Hound of the Baskervilles (Confirmed by Sidrat)
The Lord of the Rings (Animated) (Confirmed)
Madeleine [1950] (Confirmed)
The Moon-Spinners (Confirmed by mdnitoil)
The Mummy’s Shroud (Confirmed by mdnitoil)
The Plague of Zombies (Confirmed)
Quatermass and the Pit (1958 TV Series) (Confirmed by zwoti)
She (Confirmed)
Stage Fright (Confirmed by railroaded)
Stolen Face (Confirmed by zwoti)
The Vengeance of She (Confirmed)

If anyone has any of the Films/TV shows listed below could you possibly check the name in the credits

The Avengers
The Buccaneers
Cone of silence
Julius Caesar 
The Message
The Slipper and the Rose
Special Branch 
Unpublished Story

'The Adventurer': André Morell
'The Professionals': André Morell

stolen face
andre morell

The Hound of the Baskervilles: Andre Morell

The Man Who Never Was:

André Morell

Stage Fright:

Andre Morell

His Majesty O'Keefe: Andre Morell

The Buccaneers is Andre Morell

Cone of Silence is Andre Morell