Over the past 110 years, 12 597 boys have been named Isaias. The name Isaias ranks 865th in the United States among the most common names for boys. For the first time more than ten times newborns were named Isaias in 1922. The peak of popularity of the name Isaias 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.