Kelvin

 has several meanings pertinent to the Doctor Who universe and the real world. They are listed below in alphabetical order by surname. If no surname is available, alphabetisation occurs by the disambiguation term — that is, the bit between the parentheses in a title like Waitress (Vincent and the Doctor).

As only name

 * Kelvin (The Caretaker) (TV: The Caretaker)
 * Kelvin (The Infinite Quest) (TV: The Infinite Quest)

As first name

 * Kelvin McIntyre (AUDIO: Frozen Time)

As title

 * Lord Kelvin (PROSE: Evolution)

As measurement

 * Kelvin (unit)

As first name

 * Kelvin Yu, who played Nicolas Frumkin in TV: Escape to LA

As surname

 * Sue Kelvin, who played Suzette Chambers in TV: Partners in Crime