Over the past 110 years, 423 girls and 376 661 boys have been named Roy. The name Roy ranks 5198th in the United States among the most common names for girls. For the first time more than ten times newborns were named Roy in 1915. The peak of popularity of the name Roy came in the 1920s and 1940s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.