Clan Cian was also known as the Cianachta, Race of Cian, who was the youngest son of Olioll Ollum King of Munster, and grandson of King Eoghan Mor 1st (known as) Mogh Nuadath de Leith Mogha (Mogha’s Half) of southern Ireland of the Milesian race of Heber, who contested for supremacy of all Ireland in the second century of the Christian Era.
The Cianachta were led well over 1500 years by an officially recognized King or High Chief, Prince or Ruling Lord (Irish "Ard Tiarna") chosen from members of the Carroll-O’Carroll, Rival Houses of the noble Sept of Eile O’Carroll.
Anciently in Ormond. Counties Tipperary, Waterford. And Eile O’Carroll, extending into Offaly, Leix, Kilkenny. In the fifth century the Cianacht Chief, Eile Righ Derg (Eile the Red King) ruled the territory known as Eile O’Carroll to distinguish the sept from other O’Carroll Septs.
Cearbhaill (Carroll) Son, of Aeodh, Chief of the Cianachta (Clan Cian), King of Eile. This Prince Cearbhaill led the Eilians at the Battle of Clontarf in 1014 with King Brian Boru. The Cianachta or Clan Cian by Charter of Re-Formation 1982-1983 again has been active with participation in Activities and Promotion of its former Irish Culture, and representation with the Council of Irish Chiefs, Chieftains.
Cianachta or Clan Cian, is one of the ancient to modern, recognized Clans in Ireland. Dating from the 200s A.D.
It is dedicated to the preservation of the Eile O'Carroll Territory or Carroll Kingdom of Eile O'Carroll's History. Representing Carroll~O'Carrolls, inclusive of all the related, Family Septs, Dependent Family Septs of Eile O'Carroll and other Parts of Ireland, and Worldwide.
Cianachta, Clan Cian has an Appointed Council of Chieftains and Clan Officers that preside over certain designated Regional Areas, appointed by The O'Carroll, Chief of Eile.
Cianachta, Clan Cian is Headed by the recognized Ard Tiarna. F.J. O'Carroll, of Eile O'Carroll, Chief of Name. Chief Eile, descends the Ancient, Princes of Eile O'Carroll. Eile (Ely) O'Carroll Kingdom in the Heart of Southern Ireland. Not all of the current recognized Chiefs on the Standing Council live in Ireland, The O'Carroll currently resides in the United States.
The Name, Cianachta in Irish, means the Race of Cian, and so-called, Clan Cian in English.
In Ireland the term clan refers to the people of an area, whereas in Scotland a clan is more composed of family. In ancient Ireland, the old kingdom in which the Cianachts inhabited included many family surnames. Of those families, the powerful Carrolls were overlords, or kings. Today, the desendants of those kings are called Chiefs. A few of the other families which resided within the kingdom of the Carrolls were the O'Carrolls, O'Meaghers, O'Caseys, O'Haras, and O'Garas. All of these family surnames, and related septs, are members of the Clan of Cian, or Cianachts.