Over the past 110 years, 973 girls and 156 341 boys have been named Brett. The name Brett ranks 3802th in the United States among the most common names for girls. For the first time more than ten times newborns were named Brett in 1962. The peak of popularity of the name Brett came in the 1970s and 1980s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.