Over the past 110 years, 11 161 boys and 187 girls have been named Kieran. The name Kieran ranks 914th in the United States among the most common names for boys. For the first time more than ten times newborns were named Kieran in 1931. The peak of popularity of the name Kieran 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.