Brendan has been given to about 92,141 people in the United States since 1880. It was most common in 1999, which makes it a Gen X and millennial name.
Its best year was 1999, when 4,005 babies were given the name, ranking 96th. The typical living American called Brendan is about 29 years old today. It is relatively most common in Connecticut, 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.