Jahsiah, pronounced jah-SY-uh (/dʒɑˈsaɪ.ə/), is a contemporary, vowel-shifted elaboration of the ancient Hebrew יֹאשִׁיָּהוּ (Yō’šiyyāhû), “Yahweh heals,” most familiar in English through the biblical King Josiah; the inserted aspirate preserves the sacred element “Yah” while visually distinguishing the name from its more common predecessor. Though a minor biblical bearer—rendered variously as Jesiah or Jashiah in chronicle lists— provides lexical precedent, Jahsiah’s present-day currency is chiefly the result of twenty-first-century American naming dynamics that favor inventive spellings of traditional theonyms and the resonant -iah cadence shared with Isaiah and Jeremiah. Empirical usage remains rare yet steady: since 2000 the name has hovered in the high-700s to low-890s of the U.S. Social Security rankings, with annual occurrences oscillating between 5 and 69, a pattern indicating niche but persistent appeal rather than volatile trendiness. Within onomastic studies, such statistical consistency, coupled with the name’s unmistakable biblical etymology, positions Jahsiah as an option for parents who seek theological depth and phonetic freshness without venturing into neologism.