Josaiah is a distinctive boys' name in United States, ranking #5132 in 2020 with 18 recorded births. The name reached its all-time peak in 2008 with 25 births ranking #4085. Since 1996, the popularity has increased by 157.1%. In 2020, approximately 1 in every 95,837 boys born was named Josaiah. RISING Recent data shows the name is currently rising.