Weslie is of American origin, derived from the Old English elements 'wæsc' meaning 'growth' or 'prosperity', and 'leah' signifying 'woodland clearing'. It is a unique and uncommon given name that has gained some popularity in recent years due to its distinctive sound and spelling. Weslie is generally associated with males, although it can also be used as a female name. The name may be spelled in various ways, such as Wesley or Weslee, but the most common form is Weslie.
"The name Weslie saw a significant surge in popularity from the mid-2010s onwards, with over 25 births each year since 2015, peaking at 61 births in 2023."