Isaia is a distinctive boys' name in United States, ranking #5095 in 2004 with 16 recorded births. The name reached its all-time peak in 2007 with 26 births ranking #3937. Since 1996, the popularity has increased by 14.3%. In 2004, approximately 1 in every 124,050 boys born was named Isaia. FALLING Recent data shows the name is currently falling.