Over the past 110 years, 231 boys and 20 867 girls have been named Hilary. The name Hilary ranks 4432th in the United States among the most common names for boys. For the first time more than ten times newborns were named Hilary in 1913. The peak of popularity of the name Hilary came in the 1940s and 1980s. You can see absolute numbers and relative numbers on the chart. Indicators per 100K more accurately assess the popularity of the name.