A modern spelling of Eliza, from Elizabeth, ultimately from Hebrew meaning God is my oath.
Elyza is a variant spelling of Eliza, itself a shortened form of Elizabeth — one of the most historically significant names in the Western world. Elizabeth comes from the Hebrew Elisheba (אֱלִישֶׁבַע), meaning either "my God is an oath" or "my God is abundance," the name borne by Aaron's wife in the Book of Exodus. The name passed through Greek as Elisavet, through Latin as Elisabeth, and into countless European languages, spawning a vast family of diminutives and variants: Eliza, Elise, Elsa, Liza, Lisa, Bess, Betty, Libby, and now Elyza among them.
Eliza as a standalone name gained enormous cultural traction in the 18th and 19th centuries — it was a name of queens, literary heroines, and real women of consequence. Eliza Hamilton, wife of American Founding Father Alexander Hamilton, became a figure of renewed fascination through Lin-Manuel Miranda's 2015 musical, which gave her name a new generation of admirers. But the most iconic fictional bearer remains Eliza Doolittle, the Cockney flower seller transformed by phonetics professor Henry Higgins in George Bernard Shaw's Pygmalion (1913) — later the basis of the musical My Fair Lady.
Eliza Doolittle's arc from marginalized street vendor to confident woman claiming her own identity gave the name an association with transformation, wit, and hard-won dignity that resonates to this day. The spelling Elyza is a modern flourish — the substitution of a Y for the first I gives the name a slightly more unusual visual identity while preserving its familiar sound entirely. This kind of creative respelling has become increasingly common as parents seek to give their children recognizable names with individual distinction. Elyza thus sits at the intersection of ancient Hebrew lineage, centuries of European royalty, and contemporary personalization — a name both timeless and freshly minted.