Mervyn has been given to about 1,586 people in the United States since 1880. It was most common in 1937, which makes it a interwar name.
Its best year was 1937, when 55 babies were given the name, ranking 828th. The typical living American called Mervyn is about 78 years old today.
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.