A shortened or modern form of Isaiah, from Hebrew meaning "God is salvation."
Esiah is most naturally understood as a variant spelling of Isaiah, one of the most celebrated names in the Hebrew prophetic tradition. Isaiah derives from the Hebrew 'Yeshayahu,' meaning 'Yahweh is salvation' or 'salvation of God,' a name borne by the eighth-century BCE prophet whose book opens with some of the most soaring poetry in the Hebrew Bible — visions of swords beaten into plowshares, a suffering servant, and a peaceable kingdom where the lion lies down with the lamb. Isaiah was one of the major prophets, his writings foundational to Jewish, Christian, and Islamic theology alike.
The anglicized Isaiah entered common use through the Protestant Reformation's enthusiasm for biblical names and has maintained steady dignity ever since. Notable bearers have included Isaiah Berlin, the twentieth century's great philosopher of liberty, and Isaiah Thomas, two different NBA players of that name whose careers span the 1980s to the present day. The spelling Esiah strips the name to a more phonetically transparent form, softening the initial consonant cluster and giving the name a slightly more lilting, informal feel while preserving the essential sound.
As a variant, Esiah participates in the broader tradition of creative respelling that allows families to personalize a beloved name — to make it feel chosen rather than merely inherited. It maintains all the resonance of the original: prophetic authority, poetic beauty, and a meaning that functions as a kind of blessing, suggesting that salvation and wholeness are woven into the very name of the child who bears it.