Kaysyn has been given to about 122 people in the United States since 1880. It was most common in 2025, which makes it a current name.
Its best year was 2025, when 21 babies were given the name, ranking 4799th. The typical living American called Kaysyn is about 5 years old today.
Source: US Social Security Administration, national and state name files, 2025 release. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.