Josaiah is a distinctive boys' name in United States, ranking #7847 in 2017 with 10 recorded births. The name reached its all-time peak in 2008 with 25 births ranking #4085. Since 1996, the popularity has increased by 42.9%. In 2017, approximately 1 in every 185,032 boys born was named Josaiah. RISING Recent data shows the name is currently rising.