Kellsey is a female name with English origin. It is pronounced as KEL-see (/ˈkɛlsi/). Variations of the name include Kelsey. In terms of popularity, Kellsey has been given to a small number of newborns in the United States. It ranked 15884th in 2017 and 16199th in 2016. The name has fluctuated in popularity over the years, with its highest ranking at 9145th in 2011 and its lowest at 5416th in 1997. Despite its varying popularity, Kellsey remains a charming choice for parents seeking a unique and modern name for their baby girl.