Over the past 110 years, 434 531 girls and 35 boys have been named Kathryn. The name Kathryn ranks 74th in the United States among the most common names for girls. For the first time more than ten times newborns were named Kathryn in 1910. The peak of popularity of the name Kathryn came in the 1910s and 1950s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.