Aizen has been given to about 1,934 people in the United States since 1880. It was most common in 2024, which makes it a current name.
Its best year was 2024, when 223 babies were given the name, ranking 1005th. The typical living American called Aizen is about 5 years old today. It is relatively most common in Arizona, where it accounts for 0.02% 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.