Kerby is of English origin, derived from an Old English personal name composed of the elements 'Cýr' meaning 'army' or 'armored', and 'by' meaning 'settlement' or 'farm'. It was historically used as a given name but has also been adopted as a surname. The name Kerby is not extremely common, adding to its uniqueness. In terms of popularity, it tends to fluctuate slightly over time but remains relatively uncommon globally.
"Kerby experienced its peak popularity with 21 newborns named Kerby in 1984. The following year saw a notable drop to 11 births. There were no recorded Kerby births in 1987, and the numbers remained relatively low until another peak of 11 births in 1992. From 1994 onwards, the number of babies named Kerby hovered around 5 to 9 annually."