Jasiah is a distinctive boys' name in England & Wales, ranking #2440 in 2025 with 9 recorded births. The name reached its all-time peak in 2022 with 12 births ranking #1880. In 2025, approximately 1 in every 30,215 boys born was named Jasiah. RISING Recent data shows the name is currently rising.
Jasiah is a modern variant of Josiah. Through that line it carries the older Hebrew root usually explained in relation to Yahweh supporting or healing.
Although the spelling is modern, the source ties it directly to Josiah rather than treating it as an unrelated invention. That gives it a stronger traditional footing than many other recent -iah names.