Over the past 110 years, 5 girls and 10 609 boys have been named Denny. The name Denny ranks 18497th in the United States among the most common names for girls. For the first time more than ten times newborns were named Denny in 1960. The peak of popularity of the name Denny came in the 1960s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.