Ó Braonáin is an Irish surname derived from the Gaelic Ó Braonáin, meaning "descendant of Braonán". The personal name Braonán is a byname formed from braon, which signifies "rain", "moisture", or "drop", combined with a diminutive suffix, thus translating loosely to "little rain" or "dewdrop".The surname belongs to the large class of Irish patronymic names, prefixed by Ó (grandson/descendant). Over time, the name has undergone anglicization, resulting in variant forms such as Brannon, Breen, and Brennan. The closely related Ó Braoin shares a similar root.Though less common than some of its anglicized counterparts, Ó Braonáin is primarily found in Ireland, particularly in Mayo and surrounding region. According to Forebears, it remains a rare surname in the modern context.Meaning: Descendant of Braonán ("little rain")Origin: Gaelic IrishType: PatronymicUsage Regions: Ireland, especially Mayo