Over the past 110 years, 10 609 boys and 5 girls have been named Denny. The name Denny ranks 943th in the United States among the most common names for boys. For the first time more than ten times newborns were named Denny in 1921. The peak of popularity of the name Denny came in the 1940s and 1950s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.