Over the past 110 years, 735 436 girls and 363 boys have been named Ruth. The name Ruth ranks 31th in the United States among the most common names for girls. For the first time more than ten times newborns were named Ruth in 1910. The peak of popularity of the name Ruth came in the 1910s and 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.