Adaira is likely a feminine form related to Adair, a Scottish and Irish surname from an old personal name.
Adaira is a Scottish name of Gaelic origin, rooted in the place name Adair, found in Ayrshire on Scotland's west coast. The toponym derives from the Old Gaelic 'Ath Dara,' meaning 'ford of the oak' — a landscape marker describing a crossing point over a stream where oak trees grew, the kind of precise, sensory geographical description that characterizes Celtic place-naming. The surname Adair spread through Scotland and into Ulster during the plantation era, and families carrying it emigrated across the British Empire and to North America, where it became a recognized Scottish-American clan name.
As a given feminine name, Adaira functions as a feminization of the surname Adair, following a well-worn Scottish tradition (see: Keira from Kerr, Ailsa from the island). It has never broken into mainstream popularity but has maintained a devoted following among those with Scottish heritage, particularly in Scotland itself and in diaspora communities in Canada, Australia, and the American South, where Scots-Irish ancestry runs deep. The name's literary resonances are understated but genuine: it carries the austere beauty of Scottish Romantic landscape poetry, the granite-and-heather aesthetic of the country.
Pronounced ah-DARE-ah or ah-DAY-rah depending on regional convention, Adaira has an elegant three-syllable arc that distinguishes it from the crowd of shorter names without becoming difficult. Its rarity is its chief asset — a name that feels genuinely discovered rather than chosen from a list.