In 2025, 16 US boys were named Brennon, making it the 5,648th most common boys’ name of the year, down 1,943 places from #3,705 in 2024. That is 14 fewer than the 30 boys named Brennon in 2024. Its best rank for boys was #867, reached in 1999. The most boys given the name in a single year was 189, in 2009. For comparison, it was #2,150 in 2015 and unranked in 1950.
Social Security card records list Brennon in 60 years of the 146 from 1880 to 2025, starting in 1958 with 6 babies. In all, 4,382 US babies have been given the name, all of them boys. Its busiest decade was the 2000s, with 1,485 babies named Brennon.
Over the 10 years from 2016 to 2025, 419 US boys were named Brennon; the busiest of those years was 2017, with 58. In 2025 that was about 1 in 106,755 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Brennan (35,487 babies since 1880) and Brennen (9,217 babies since 1880). Rarer spellings such as Briannon are summarised on this page.