Over the past 110 years, 26 408 girls have been named Fiona. The name Fiona ranks 769th in the United States among the most common names for girls. For the first time more than ten times newborns were named Fiona in 1958. The peak of popularity of the name Fiona came in the 2000s and 2010s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.