Isaia is a distinctive boys' name in United States, ranking #4083 in 1998 with 17 recorded births. The name reached its all-time peak in 2007 with 26 births ranking #3937. Since 1996, the popularity has increased by 21.4%. In 1998, approximately 1 in every 112,430 boys born was named Isaia. FALLING Recent data shows the name is currently falling.