Jasiah is a distinctive girls' name in United States, ranking #6540 in 2019 with 18 recorded births. The name reached its all-time peak in 2008 with 46 births ranking #3545. Since 1996, the popularity has increased by 200.0%. In 2019, approximately 1 in every 93,198 girls 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.