Isaia is a distinctive boys' name in United States, ranking #4026 in 2001 with 20 recorded births. The name reached its all-time peak in 2007 with 26 births ranking #3937. Since 1996, the popularity has increased by 42.9%. In 2001, approximately 1 in every 97,142 boys born was named Isaia. FALLING Recent data shows the name is currently falling.