Cayson is of American origin, derived from the English surname 'Casey', which was originally an Irish Gaelic name, 'Cathasaigh'. It means 'vigorous' or 'alert'. The name gained popularity in the United States during the 21st century and has been rising steadily in usage since then.
The name Cayson saw fluctuations over time with peaks in 2003 and 2010, but remained consistently popular between 2008 and 2009. However, there was a notable decline after 2012, with the birth count stabilizing around five per year until 2019. Overall, Cayson has been chosen for 48 newborns since 2003.