Kaidyn has been given to about 4,061 people in the United States since 1880. It was most common in 2012, which makes it a millennial-parent name.
Its best year was 2012, when 278 babies were given the name, ranking 2069th. The typical living American called Kaidyn is about 13 years old today. It is relatively most common in Florida, where it accounts for 0.01% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.