From Irish Daire, meaning oak tree or fruitful, and borne in early Irish legend.
Daire (also rendered Daire or Dara in some traditions) is an ancient Irish name with roots stretching back through Old Irish to proto-Celtic. It is generally understood to mean "fruitful" or "fertile," with some linguists connecting it to the word for "oak," the sacred tree of the druids. The oak association gives Daire a resonance that speaks to strength, longevity, and a deep bond with the natural world — values at the heart of early Celtic culture.
In Irish mythology, Daire mac Fiachnae is one of the name's most famous bearers: the Ulster chieftain who owned the legendary Brown Bull of Cooley (the Donn Cuailnge), whose refusal to lend the bull to Queen Medb of Connacht sets the entire epic Táin Bó Cúailnge in motion. The name appears across early Irish literature and hagiography — several saints bore it, and it was common among the early medieval Gaelic nobility. Daire is also an element in several Irish place names, including Derry (from Doire, "oak grove"), one of Ireland's great historic cities.
For much of the modern era Daire faded from mainstream use, preserved mainly within Irish-speaking communities and families with a strong sense of Gaelic heritage. The late 20th century revival of interest in Irish language and culture brought many old names back into currency, and Daire has benefited from that wave. Its brevity, its soft pronunciation (DAHR-uh or DAIR-uh depending on dialect), and its genuine antiquity make it appealing to parents who want something distinctly Irish without the familiarity of Cian or Niamh.