Josaiah is a distinctive boys' name in United States, ranking #4430 in 2007 with 22 recorded births. The name reached its all-time peak in 2008 with 25 births ranking #4085. Since 1996, the popularity has increased by 214.3%. In 2007, approximately 1 in every 94,329 boys born was named Josaiah. RISING Recent data shows the name is currently rising.