Over the past 110 years, 12 boys and 27 775 girls have been named Fern. The name Fern ranks 9968th in the United States among the most common names for boys. For the first time more than ten times newborns were named Fern in 1919. The peak of popularity of the name Fern 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.