Cian in the context of Miach

Lugh or Lug (Old Irish: [l̪uɣ]; modern Irish: Lú [l̪ˠuː]) is a figure in Irish mythology. A member of the Tuatha Dé Danann, a group of supernatural beings, Lugh is portrayed as a warrior, a king, a master craftsman and a saviour. He is associated with skill and mastery in multiple disciplines, including the arts. Lugh also has associations with oaths, truth, and the law, and therefore with rightful kingship. He is also associated with intelligence. Lugh is linked with the harvest festival of Lughnasadh, which bears his name. His most common epithets are Lámfada (Modern Irish: Lámhfhada [ˈl̪ˠaːw ad̪ˠə]; "long hand" or "long arm", possibly for his skill with a spear or his ability as a ruler) and Samildánach (Modern Irish: Samhaildánach [ˈsˠawəlʲ d̪ˠaːnˠəx]; "equally skilled in many arts"). This has sometimes been anglicised as "Lew of the Long Hand".

In mythology, Lugh is the son of Cian and Ethniu (or Ethliu). He is the maternal grandson of the Fomorian tyrant Balor, whom Lugh kills in the Battle of Mag Tuired. Lugh's son is the hero Cú Chulainn, who is believed to be an incarnation of Lugh.

In Irish mythology, Balor or Balar was a leader of the Fomorians, a group of malevolent supernatural beings, and considered the most formidable. He is often described as a giant with a large eye that wreaks destruction when opened. Balor takes part in the Battle of Mag Tuired, and is primarily known from the tale in which he is killed by his grandson Lugh of the Tuatha Dé Danann, son of Cian. He has been interpreted as a personification of the scorching sun, and has also been likened to figures from other mythologies, such as the Welsh Ysbaddaden and the Greek Cyclops.

In Irish mythology, Dian Cécht (Old Irish pronunciation: [d̠ʲiːa̯n ˈkʲeːxt̪]; also known as Cainte or Canta) was the god of healing, the healer for the Tuatha Dé Danann, and son of the Dagda according to the Dindsenchas.

He was the father of Cu, Cethen and Cian. His other children were Miach, Airmed, Étan the poet and Ochtriullach (Octriuil). Through Cian, he is also Lugh's paternal grandfather.