Josaiah is a distinctive boys' name in United States, ranking #4706 in 2003 with 17 recorded births. The name reached its all-time peak in 2008 with 25 births ranking #4085. Since 1996, the popularity has increased by 142.9%. In 2003, approximately 1 in every 116,192 boys born was named Josaiah. RISING Recent data shows the name is currently rising.