Dair is the Irish name of the seventh letter of the Ogham alphabet, áÂÂ, meaning "oak". The (Early ) is related to Welsh and to Breton . Its Proto-Indo-European root was *dóru ("tree"), possibly a deadjectival noun of *deru-, *drew- ("hard, firm, strong, solid"). Its phonetic value is [d].
Dair forms the basis of some first names in Irish Gaelic such as Daire, Dara, Darragh and Daragh.
In the medieval kennings, called BrÃÂatharogam or Word Ogham the verses associated with Dair are:
- "highest tree" in the Word Ogham of Morann mic MoÃÂn
- "handicraft of a craftsman" in the Word Ogham of Mac ind ÃÂc
- "most carved of craftsmanship" in the Word Ogham of Culainn.