From Irish Gaelic Dallán, a diminutive of dall meaning 'blind,' borne by an early Irish saint and poet.
Dallan is an Irish name of considerable antiquity, derived from the Old Irish 'dall,' meaning 'blind,' with the diminutive suffix '-án' giving it a quality of endearment — 'little blind one' is the literal rendering, though names of this type in Gaelic tradition often carried spiritual or poetic connotations rather than purely physical ones. Blindness in the ancient Irish and classical Greek worlds was frequently associated with inner sight, with the visionary capacity of the poet or bard who sees what others cannot.
The name's most celebrated bearer is Dallán Forgaill, the sixth-century Irish poet credited with composing the Amra Choluimb Chille, a eulogy for Saint Columba of Iona written around the time of the saint's death in 597 AD. The Amra is among the oldest surviving texts in Old Irish, making Dallán Forgaill one of the earliest named authors in the Irish literary tradition — a distinction that gives the name a remarkable cultural depth. Legend holds that Dallán was himself blind, that his sight was restored through Columba's intercession, and that he died a martyr's death, killed by sea raiders.
Dallan is a name that has remained quietly present in Ireland without ever becoming fashionable in the anglophone mainstream, which gives it a quality of genuine heritage rather than revived trend. For parents drawn to Celtic names beyond the well-worn paths of Liam or Aoife, Dallan offers deep roots, a poetic past, and the singular honor of being the name of the man who wrote the oldest Irish poetry that survives.