Kallie is an American spelling of Callie, a pet form of Caroline or Calista that today stands on its own; through Callie it is usually linked to the Greek kallos, "beauty", or kalliste, "most beautiful". The K spelling arrived in the 1980s and gives the name a brisker look. Kallie has been in the US top 1000 every year since 2000, peaked at number 643 in 2014 and ranks number 934 in 2025.