Alphonzo has been given to about 2,030 people in the United States since 1880. It was most common in 1963, which makes it a boomer-era name.
Its best year was 1963, when 43 babies were given the name, ranking 1176th. The typical living American called Alphonzo is about 58 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.