Lesly is of French origin, derived from the given name Leslie, which was originally a Scottish surname meaning 'garden of holly'. The name Lesly gained popularity in France during the 19th century and has since been used independently as a female given name.
The name Lesly experienced significant fluctuations in popularity over the years, with periods of high and low birth frequency. The peak occurred between 1963 to 1973, with a particularly notable spike in 1973 (11 births), and again in the late 1980s to early 1990s. However, there were also several years with only five or fewer Lesly births, notably in the 1950s and from the late 1990s onwards. Overall, the name was given to a total of 504 babies across these decades.