Over the past 110 years, 15 503 boys have been named Efrain. The name Efrain ranks 789th in the United States among the most common names for boys. For the first time more than ten times newborns were named Efrain in 1922. The peak of popularity of the name Efrain came in the 1990s and 2000s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.