Cleissy is of French origin, derived from the Occitan name Clais, which means "lame" or "clumsy". This name was once quite popular in France but has since fallen out of common usage. It is often spelled Cleisy or Cleisse interchangeably. There are no well-known historical figures or famous people named Cleissy, contributing to its obscurity today.
"Cleissy saw an equal number of babies named each year, with five being born in both 2021 and 2022, making a total of ten Cleissys over those two years."