List of Famous people with last name Callendar

Sir Alexander Livingston of Callendar was a significant figure in the early part of the reign of King James II of Scotland.

Hugh Longbourne Callendar was a British physicist known for his contributions to the areas of thermometry and thermodynamics.

Alexander Livingston, 3rd Earl of Callendar was a Scottish nobleman.

Guy Stewart Callendar was an English steam engineer and inventor. His main contribution to knowledge was developing the theory that linked rising carbon dioxide concentrations in the atmosphere to global temperature. He was the first to demonstrate that the Earth’s land temperature had increased over the previous 50 years in 1938. This theory, earlier proposed by Svante Arrhenius, has been called the Callendar effect. Callendar thought this warming would be beneficial, delaying a "return of the deadly glaciers."

James Livingston, 1st Earl of Callendar, army officer who fought on the Royalist side in the Wars of the Three Kingdoms.