Meaning

noun the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites

noun British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)

originOf Celtic/Scottish Gaelic origin, possibly from caol (“narrow”) or coille (“wooded”) + abhainn (“river”). The surname is derived from the river. The surname was also possibly influenced by Calvert (Middle English calfhirde).

Etymology from Wiktionary, CC BY-SA 3.0