Eithne is considered by some sources to be the feminine cognate of the name Aidan.
The marriage of "Eithne, daughter of King Kjarval of Ireland" and Hlodvir Thorfinnsson, Earl of Orkney is reported in the Orkneyinga saga and Earl Sigurd the Stout, who was killed at the battle of Clontarf is called their son.
Lucan Concert Band was formed in 1983 by Eithne Donnelly, its purpose being to provide musical education to the youth in Lucan, County Dublin, Ireland, where it is based.
Eithne Kenny, mother of Taoiseach Enda Kenny and wife of Henry Kenny, died here at the age of 93 on 26 November 2011.
Nicky and Eithne left Clannad in 1982, shortly after the completion of their album Fuaim.
The Eithne Walls Research Fund was established in memory of ophthalmology trainee Dr. Eithne Walls who was lost in the Air France Flight 447 crash.