Over the past 110 years, 23 boys and 10 074 girls have been named Rhea. The name Rhea ranks 8574th in the United States among the most common names for boys. For the first time more than ten times newborns were named Rhea in 1920. The peak of popularity of the name Rhea came in the 1920s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.