Kaesen is of Scottish origin, derived from the surname Kaysen or Kayson. It is believed to be an Anglicized form of the Gaelic Mac Aoidh, which means "son of Aodh." Aodh, in turn, is a derivative of the Irish name Áed, meaning "fire" or "noble." The name Kaesen is unique and uncommon, with only a handful of individuals bearing it worldwide. It may also be considered a variant spelling of the more common names Casey or Kaysen.
"The name Kaesen experienced a notable surge in popularity between 2012 and 2015, with over 20 births each year during this period. However, it has since declined, averaging around 17 births annually from 2016 to 2023."