Izaiah is a moderately popular boys' name in United States, ranking #469 in 2005 with 534 recorded births. This places Izaiah in the top 4% of ranked US boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2009 with 742 births ranking #400. Since 1996, the popularity has increased by 575.9%. In 2005, approximately 1 in every 3,740 boys born was named Izaiah. FALLING Recent data shows the name is currently falling.