From the English surname and word for a holy day or festival, later used as a cheerful given name.
Holliday is an elaborated surname-turned-given-name rooted in the Old English *haligdæg* — literally *holy day*, the term from which our word holiday derives. In medieval England, holy days were days of religious observance and communal rest; by the Middle Ages, Holliday had crystallized as a surname, likely attached to someone born on such a day or associated with their celebration. It carries, at its core, a quality of festivity and sacred pause.
The name's most legendary bearer is John Henry "Doc" Holliday (1851–1887), the Georgia-born dentist, gambler, and gunfighter whose friendship with Wyatt Earp made him a central figure in the mythology of the American West. K. Corral in Tombstone, Arizona in 1881 — a consumptive man described as both lethal and gallantly loyal — became one of the defining set pieces of frontier legend.
He has been portrayed by Val Kilmer, Dennis Quaid, and Victor Mature, among others, and the surname has carried a cinematic, slightly dangerous elegance ever since. As a given name — particularly for girls — Holliday takes on an entirely different register: warm, festive, a little theatrical. It suggests someone who brings occasion into ordinary days, who treats life as worth marking.
The spelling with the double-l distinguishes it from the common noun and gives it more visual character. It belongs to a growing tradition of surname-as-first-name choices that feel both vintage and fresh, grounded in American history yet perfectly at home in the present. It is, in every sense, a name with a story already attached.