For the warrior(s) of the same name in the Ulster Cycle

Ulster Cycle

The Ulster Cycle , formerly known as the Red Branch Cycle, one of the four great cycles of Irish mythology, is a body of medieval Irish heroic legends and sagas of the traditional heroes of the Ulaid in what is now eastern Ulster and northern Leinster, particularly counties Armagh, Down and...

, see Mac Cécht (warrior)

Mac Cécht (warrior)

Mac Cécht is the patronymic or cognomen given to one or two warrior champions from Connacht in the Ulster Cycle of early Irish literature...

In Irish mythology

Irish mythology

The mythology of pre-Christian Ireland did not entirely survive the conversion to Christianity, but much of it was preserved, shorn of its religious meanings, in medieval Irish literature, which represents the most extensive and best preserved of all the branch and the Historical Cycle. There are...

, Mac Cecht of the Tuatha Dé Danann

Tuatha Dé Danann

The Tuatha Dé Danann are a race of people in Irish mythology. In the invasions tradition which begins with the Lebor Gabála Érenn, they are the fifth group to settle Ireland, conquering the island from the Fir Bolg....

 was a son of Cermait

Cermait

In Irish mythology, Cermait of the Tuatha Dé Danann was a son of the Dagda. He was known by the epithet Milbél . He was killed by Lug after he had an affair with Lug's wife. His three sons, Mac Cuill, Mac Cecht and Mac Gréine, avenged his death, and went on to become joint High Kings of Ireland....

, son of the Dagda

The Dagda

The Dagda is an important god of Irish mythology. The Dagda is a father-figure and a protector of the tribe. In some texts his father is Elatha, in others his mother is Ethniu. Other texts say that his mother is Danu; while others yet place him as the father of Danu, perhaps due to her...

. Mac Cecht's given name was Téthur and he was named Mac Cecht after his god, Cecht, the plough

Plough

The plough or plow is a tool used in farming for initial cultivation of soil in preparation for sowing seed or planting. It has been a basic instrument for most of recorded history, and represents one of the major advances in agriculture...

share. His wife was Fodla

Fódla

In Irish mythology, Fódla or Fótla , daughter of Ernmas of the Tuatha Dé Danann, was one of the tutelary goddesses of Ireland. Her husband was Mac Cecht....

.

He and his brothers Mac Cuill

Mac Cuill

In Irish mythology, Mac Cuill of the Tuatha Dé Danann, was a son of Cermait, son of the Dagda. Mac Cuill's given name was Éthur and he was named Mac Cuill after his god, Coll, the hazel. His wife was Banba....

 and Mac Gréine

Mac Gréine

In Irish mythology, Mac Gréine of the Tuatha Dé Danann was a son of Cermait, son of the Dagda. Mac Gréine's given name was Céthur and was named Mac Gréine after his god, Grian, the sun. Mac Gréine is Irish for "Son of the Sun". His wife was Ériu....

 killed Lug

Lugh

Lug or Lugh is an Irish deity represented in mythological texts as a hero and High King of the distant past. He is known by the epithets Lámhfhada , for his skill with a spear or sling, Ildánach , Samhildánach , Lonnbeimnech and Macnia , and by the...

 in revenge for their father. The three brothers became joint High Kings of Ireland

High King of Ireland

The High Kings of Ireland were sometimes historical and sometimes legendary figures who had, or who are claimed to have had, lordship over the whole of Ireland. Medieval and early modern Irish literature portrays an almost unbroken sequence of High Kings, ruling from Tara over a hierarchy of...

, rotating the sovereigty between them a year at a time, covering twenty-nine or thirty years depending on the source consulted. They were the last kings of the Tuatha Dé Danann

Tuatha Dé Danann

The Tuatha Dé Danann are a race of people in Irish mythology. In the invasions tradition which begins with the Lebor Gabála Érenn, they are the fifth group to settle Ireland, conquering the island from the Fir Bolg....

 before the coming of the Milesians

Milesians (Irish)

Milesians are a people figuring in Irish mythology. The descendants of Míl Espáine, they were the final inhabitants of Ireland, and were believed to represent the Goidelic Celts.-Myth:...

.