Isaia is a distinctive boys' name in United States, ranking #10077 in 2025 with 7 recorded births. The name reached its all-time peak in 2007 with 26 births ranking #3937. Since 1996, the popularity has decreased by 50.0%. In 2025, approximately 1 in every 244,011 boys born was named Isaia. FALLING Recent data shows the name is currently falling.