Cian

In Irish mythology, Cían (), nicknamed Scal Balb, was the son of Dian Cecht, the physician of the Tuatha Dé Danann, and best known as the father of Lugh Lamhfada. Cían's brothers were Cu, Cethen, and Miach.
Cían was slain by the Sons of Tuireann, for which Lugh demanded various treasures around the world as éraic (compensation), according to the account in the "Book of Invasions" ("Lebor Gabála Érenn", LGE) as well as the late romance version "The Fate of the Children of Tuireann".
Name.
Cían means "enduring one"; "cían" signifying "long, enduring, far, distant".
Scal Balb is a nickname borne by other personages and means "dumb champion", with "dumb" in the sense of unable to make speech.
By most accounts, Lug's mother is the Fomorian princess Ethniu, but according to an interpolated text the LGE, Cian is also known by the name Ethlend (Ethlenn). Under that assumption, "Lug mac Ethlend" becomes a patronymic (rather than a matronymic) designation. A clearly patronymic instance, from a different source altogether, is "Lug mac Ethlend maic Tigernmais (son of Ethliu, son of Tigernmas)" in the story "Baile an scáil", where Lug's father must be "Ethliu mac Tigernmais".
Genealogy.
In the saga "Cath Maige Tuired" Cian's union with Ethniu is a dynastic marriage following an alliance between the Tuatha Dé Danann and the Fomorians, and Ethniu bore him a son, Lugh. In the "Lebor Gabála Érenn" (LGE, "The Book of Invasions") Cian gives the boy Lugh to Tailtiu, queen of the Fir Bolg, in fosterage.
His brothers are Cu, Cethen, Miach sons of Dian Cecht, according to a tract in the "LGE". Cian, Cu and Cethen are called "three sons of Cáinte (English: Cainté)" in the romance version of "The Fate of the Children of Tuireann", with O'Curry commenting that the identity of Cáinte is uncertain.
Death and revenge.
Cían's demise, and the consequent revenge by his son Lugh, forcing on the perpetrators the impossible quest for treasures is told in "[A]Oidheadh Chloinne Tuireann" (ACT or OCT, "The Fate of the Children of Tuireann"), the full romance of which only survives in late manuscripts (16th century), though synopses of the tale survive in medieval redactions of the "LGE".
In the story, Cían was killed by the sons of Tuireann—Brian, Iuchar and Iucharba—after trying unsuccessfully to escape from them in the form of a pig (actually a "lapdog", in older tradition, e.g. the "LGE").
Lug set them a series of seemingly impossible quests as recompense (). They achieved them all but were fatally wounded in completing the last one. Despite Tuireann's pleas, Lug denied them the use of one of the items they had retrieved, the magic pigskin of Tuis that healed all wounds. They died of their wounds, and Tuireann died of grief over their bodies.
Cian's marriage.
There may have been a fuller account of Cian's bridal quest in medieval tradition, but they have only survived in orally transmitted folktales. The folktale concerns the magical cow Glas Gaibhnenn (or Glas Ghaibhlenn).
Cian's names in folklore.
The name of the hero should be Cian mac Cáinte in proper Irish, but is phonetically transcribed as Kian mac Kontje in the tale "The Gloss Gavlen", collected by Larminie.
The hero's name corrupted to Mac Cinnfhaelaidh (Mac Kineely, MacKineely or MacKenealy) in a different version of the tale printed in footnote by John O'Donovan. This name "Mac Cinnfhaelaidh" has been explained to mean "Son of Wolf's Head" (genitive of "head" + genitive of fáel "wolf").
The hero is Fin MacKinealy in "Balor on Tory Island" collected by Curtin, and echoed as Fionn mac Cionnfhaolaidh in its Irish version edited by Lloyd (Seosamh Laoide). In these, the siblings are named Gial Duv () and Donn.
Synopsis of Donovan's version.
The synopsis of the cow tale as printed by O'Donovan is as follows; the tale has also been retold by Lady Gregory, and her emendations will be noted below as well.
In a place called Druim na Teine or "Fiery Ridge" (Drumnatinny, Co. Donegal) where a forge was kept, there lived three brothers, Gavida, Mac Samthainn and Mac Cinnfhaelaidh. Across the sea on Tory Island there lived a famous warrior named Balor, with one eye in the middle of the forehead, and another eye with a basilisk-like power in the back of his head.
Balor learns from a druid's prophecy that he will be killed by his own grandson. To prevent this he imprisons his only daughter Ethnea in the tower which stands on a tall rock formation called the Tor Mór, or "Great Tower".
Mac Kineely (=Cian) owns a prolific milch-cow called "Glos Gavlin" ("recté" ), which is coveted by everyone including Balor. While the cow is in the care of Mac Kineely's brother Mac Samthainn, Balor appears in the form of a little red-haired boy and tricks him into handing him the cow. Mac Kineely=Cian wishes to reclaim the cow, but is advised that he can only succeed when Balor is dead. Cian then consults Biroge (Biróg) of the Mountain, who is his "leanan sídhe" or familiar spirit and a banshee and she transports him by magic to the top of Balor's tower, where he seduces Ehnea.
In time Ethnea gives birth to triplets, which Balor gathers up in a sheet and sends out to be drowned in a whirlpool. The messenger drowns two of the babies but unwittingly drops one child (unnamed in the original telling, but Lugh in Lady Gregory's version) into the harbour, where he is rescued by Biróg. She takes the baby to his father, who gives him to his brother, Gavida the smith, in fosterage.
As noted, Cian's offspring is not explicitly called "Lugh" in O'Donovan's version of the cow folktale, but the boy is called "Dul Dauna" in Larminie's collected folktale. The name Dul Dauna taken at face value is glossed as "the blind stubborn" (< ') by Larminie and "black surly one" (< '?) by Westropp, but is also thought to be a corruption of Lugh's byname "Ildanach" "master of all knowledge". However, the boy is called by something close to the god's name, namely Lui Lavada (Lui Longhand) in two tales collected by Curtin .
Cian's death by Balor.
In Donovan's version, Mac Kineely=Cian does not succeed in regaining the magic cow in his lifetime (or rather, he himself is killed before the destruction of Balor, which was the prophesied prerequisite for the regaining of the cow). It is told that Mac Kineely's head was struck off by Balor, and a piece of white stone was permanently tainted with the blood, running in the form of red veins. The supposed veined marble was propped on a pillar and became a local monument known as "Clogh-an-Neely" (reconstructed ).
Welsh counterpart.
Some scholars argue that the Welsh deity Gwydion is the counterpart to Cian.
The story of the birth of Lleu Llaw Gyffes, the Welsh incarnation of Lugh, occurs in the Mabinogi tale of "Math fab Mathonwy (branch)". Although the tale does not explicitly identify Lleu's father, it has been asserted that Lleu was Gwydion's "incestuously begotten son", thus making Gwydion the Welsh equivalent of Cian.
The emphasis of study is the parallel between Gwydion and Cian=MacKineely of Irish folktale (rather than Cian of the mythological tracts or "OCT") in the case of Welsh scholar John Rhys has pursued.
One parallel is that the newborn are unwanted by their forebears and condemned to die, but survive. And the paralleling theme is recognizable as the ubiquitous one of "King and His Prophesied Death" according to other scholars. And certainly the prophecy of death by the hand of one's child or grandchild occurs in the Cian-Balor folktale as well as the Greek stories of Perseus and Oedipus Rex.