Oliver

 has many meanings within and without the Doctor Who universe and the real world. They are listed alphabetically by surname.

As only name

 * Oliver, a security guard. (COMIC: The Purrfect Crime)
 * Oliver, a seventeen-year-old boy (PROSE: Special Weapons)

As first name

 * Oliver Barnes, an elderly man and member of Silver Cloak, an organisation created for finding the Doctor. (TV: The End of Time)
 * Oliver Charles, a 20th century politician who was killed by a Slitheen to take his skin. (TV: Aliens of London)
 * Oliver Cromwell, the leader of the English army in Ireland in September 1649.
 * Oliver Day, a companion of the Fourth Doctor.
 * Oliver Harper, a companion of the First Doctor.
 * Oliver Harrington, a deceased friend of Martha Jones. (AUDIO: Lost Souls)
 * Oliver Marks, a WWII veteran. (PROSE: The Glamour Chase)
 * Oliver Morgenstern, a medical student. (TV: Smith and Jones)
 * Oliver Redfern, a deceased soldier. (TV: Human Nature)

Other

 * Oliver Twist, a book by Charles Dickens

As first name

 * Oliver Ager, a production accountant for Doctor Who
 * Oliver Ferriman, an actor who played Jonah Bevan in TV: Adrift
 * Oliver Gilbert, a voice actor who voiced the Daleks in TV: Day of the Daleks
 * Oliver Hume, a voice actor for Big Finish Productions
 * Oliver Hume, a voice actor for Big Finish Productions
 * Oliver Mellor, an actor who played Matt Crane in TV: Army of Ghosts
 * Oliver Maguire, who played an Shrieve in TV: The Ribos Operation
 * Oliver Smith, an actor who played Drak in TV: The Twin Dilemma

As Last name

 * Sean Oliver, an actor who played Stuart in TV: Survival