Over the past 110 years, 330 892 girls and 32 boys have been named Kathy. The name Kathy ranks 106th in the United States among the most common names for girls. For the first time more than ten times newborns were named Kathy in 1926. The peak of popularity of the name Kathy came in the 1950s and 1960s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.