Over the past 110 years, 13 930 boys have been named Keenan. The name Keenan ranks 825th in the United States among the most common names for boys. For the first time more than ten times newborns were named Keenan in 1955. The peak of popularity of the name Keenan 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.