We found information about the following specific ships:

HMS Illustrious

Description: 1939 Illustrious-class aircraft carrier

HMS Illustrious

Description: 1978 Invincible-class aircraft carrier

Aliases: IMO 8949563

HMS Illustrious

Description: 1803 Fame-class third-rate ship of the line

HMS Illustrious

Description: 1896 Majestic-class pre-dreadnought battleship

HMS Illustrious

Description: 1789 Arrogant-class third-rate ship of the line

We also found the following citations which are not yet associated with specific ships: