Likely a modern variant of Esmeralda, from Spanish esmeralda, meaning "emerald."
Esmerae is a lyrical variant in the constellation of names built on the Old Spanish and Portuguese 'esmeralda,' meaning emerald — the deep green gemstone whose name traces back through Latin to the ancient Greek 'smaragdos,' itself borrowing from a Semitic root. Emerald has long carried associations of renewal, vision, and hidden depth; in medieval lapidary tradition, the stone was said to reveal truth and protect against enchantment. The name Esmeralda was popularized for literary audiences by Victor Hugo's 1831 novel Notre-Dame de Paris, in which the dancer Esmeralda is one of literature's great figures of persecuted innocence and radiant vitality.
Esmerae pares the full name to something more intimate and modern — the '-ae' ending, rare in everyday usage, gives the name a classical Latin feminine quality, reminiscent of the declension endings of Roman women's names. This makes Esmerae feel simultaneously ancient and invented, like an artifact unearthed from a language that might have existed. It may also draw on the shorter form Esme, a name with Franco-Scottish origins meaning 'esteemed' or 'beloved,' which has been in continuous use since the sixteenth century.
In contemporary naming culture, Esmerae appeals to parents who want the warmth and jewel-imagery of Esmeralda or Esme without using a form that has become familiar. The '-rae' suffix has become productive in modern English name-coinage — think Rae, Morae, Esmerae — lending names a soft, luminous close that feels both invented and timeless.