Over the past 110 years, 238 871 boys and 15 girls have been named Theodore. The name Theodore ranks 144th in the United States among the most common names for boys. For the first time more than ten times newborns were named Theodore in 1910. The peak of popularity of the name Theodore 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.