The derivation of the personal name Dálach is not entirely obvious, but the most widely accepted theory is that it derives from the same root as dáil meaning "assembly;" the Irish Parliament is called 'Dáil Éireann.'
Although the precise origin of Dálach remains uncertain, it is likely linked to the idea of gathering or assembly, as suggested by its potential relationship to the Irish Parliament's name, 'Dáil Éireann.'