Over the past 110 years, 156 341 boys and 973 girls have been named Brett. The name Brett ranks 207th in the United States among the most common names for boys. For the first time more than ten times newborns were named Brett in 1940. The peak of popularity of the name Brett came in the 1980s and 1990s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.