Brett has been given to about 162,513 people in the United States since 1880. It was most common in 1986, which makes it a Gen X and millennial name.
Its best year was 1986, when 4,904 babies were given the name, ranking 69th. The typical living American called Brett is about 41 years old today. It is relatively most common in Louisiana, 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.