Isaias is a moderately popular boys' name in United States, ranking #491 in 2021 with 600 recorded births. The name reached its all-time peak in 2023 with 705 births ranking #441. Since 1996, the popularity has increased by 108.3%. In 2021, approximately 1 in every 2,914 boys born was named Isaias. STABLE Recent data shows the name is currently stable.