Eileen

Niamh

Old Irish · “Derived from the Old Irish word "niamh" meaning "bright" or "radiant". The name belongs to one of the most celebrated figures of Irish mythology, Niamh of the Golden Hair, a princess of Tír na nÓg (the Land of Eternal Youth) who fell in love with the poet-warrior Oisín and carried him away on her white horse across the sea.”

Brigid

Old Irish · “Derived from the Old Irish "Brigit" or "Bríg", meaning "exalted one" or "the high one", from a Proto-Celtic root "briganti" meaning "high, lofty, the exalted one". Brigid was one of the most important goddesses of pre-Christian Ireland, associated with poetry, healing, smithcraft, and the hearth fire. The Christianised Saint Brigid of Kildare (c. 451–525) became one of Ireland's three patron saints.”

Clodagh

Irish · “Derived from the River Clóirtheach (anglicised as Clody) in County Wexford and County Carlow, Ireland. River names in Irish tradition often carry associations with flowing abundance, boundary-crossing, and the sacred nature of water. The name was popularised by the Marquess of Waterford, who named his daughter Clodagh in 1879, after which it entered the wider Irish naming tradition.”

Aileen

Scottish / Irish · “A Scottish and Irish variant of Eileen, sharing the same origin in the Irish "Eibhlín" (itself from the Norman French Aveline). Aileen is the preferred spelling in Scotland and among the Scottish diaspora, where it is treated as a distinct name rather than a mere variant, found throughout the Highlands and in the Scots-Irish communities of Ulster.”

Aiden

“An anglicised spelling of Aodhán, the diminutive of the Old Irish Aodh, meaning "fire" — Aodh was the Celtic god of sun and fire. The name was borne by several early Irish saints, most notably Saint Aidan of Lindisfarne (c. 590–651), who helped Christianise northern England. Aiden is the most common American English spelling; Aidan is the Irish and British form.”

Éabha

“The Irish form of Eve, from the Hebrew "Chavah" meaning "living" or "life-giver". In Irish Gaelic the name takes the form Éabha, pronounced quite differently from the English Eve, and has been used in Ireland since the early Christian period. In Irish tradition Éabha (Eve) is also associated with various legendary and mythological figures, and the name enjoyed a significant revival in Ireland during the twentieth-century Gaelic language revival.”

Brennan

“An Anglicised form of the Irish surname Ó Braonáin, meaning "descendant of Braonán", where Braonán is a diminutive of "braon" meaning "moisture", "drop", or "sorrow". The name is associated with Saint Brendan the Navigator (Naomh Bréanainn), the 6th-century Irish monk who, according to legend, sailed across the Atlantic to discover a western paradise. When used as a first name, it carries both the sorrow-drop etymology and the adventuring saint.”

Keenan

“An anglicised form of the Irish "Cianán" or "Caonán", diminutive forms meaning "little ancient one" (from "cian", ancient) or "little gentle one" (from "caon", gentle). The name was borne by several early Irish saints, including Saint Cianán of Duleek, who is credited with founding one of the earliest stone churches in Ireland at Duleek in County Meath in the fifth century.”

Neil

“Anglicised from the Irish Niall, a name of disputed meaning — proposed interpretations include "cloud," "passionate," "champion," and "vehement." The name was borne by several early Irish kings and saints, including Niall of the Nine Hostages, the legendary ancestor of the Uí Néill dynasty. Neil is the standard anglicised spelling used outside Ireland.”

Oonagh

“Possibly an Irish form connected to "Una" or "Oonagh", from Old Irish "uan" meaning "lamb" or possibly from a root meaning "unity" or "one". In Irish mythology and folklore, Áine/Oonagh appears as a fairy queen — Oonagh was the queen of the fairies in many folk traditions, the wife of Fionnbarra, king of the Irish fairies, renowned for her golden hair that reached the ground.”