Yosiah is a spelling of Josiah that reflects the Hebrew pronunciation Yoshiyahu, a name usually explained as "Yahweh supports" or "Yahweh heals". Josiah was the reforming boy king of Judah in the Bible, and the Y spelling appeals to families who want the biblical name in a form closer to its original. Yosiah had fewer than five births in 2000, moved from the 6000s into the 3000s during the late 2010s and reaches its best rank, number 2475, in 2025 with 55 boys.