Echthighern mac Cennétig, also spelled Echthigern, (died 950) was a son of Cennétig mac Lorcáin and brother of Mathgamain and Brian Bóruma of the Dál gCais in early medieval Ireland.
Dal Khalsa | Dál gCais | Maria Vittoria dal Pozzo | Francesco Dal Co | Carlo Emmanuele dal Pozzo, 5th Prince of Cisterna | Biju Janata Dal | Toti Dal Monte | Surgeon Bong Dal-hee | Silvestro Ganassi dal Fontego | Rashtriya Parivartan Dal | Jatiyatabadi Chhatra Dal | ''Dal makhani | Dal Lake | Dal-ja's Spring | Dal | Cassiano dal Pozzo | A Dal |
Uí Fiachrach Aidhne was bounded on the north and east by the powerful independent kingdom of Hy-Many or Ui Maine; to the west by Lough Lurgan (Galway Bay) and the Corco Mo Druad (Corcomroe); and to the south by Déisi Tuisceart (later the Dál gCais, later still the O'Brian's of Thomond).