The story goes that one evening Aengus had a dream that centered around a beautiful maiden, and then he set out and searched all of Ireland for her. When at last he found her, he saw that she was chained to 150 other maidens. Her name was Caer and along with these other women, her destiny was to be turned into swans at the feasting of Samhain. Aengus desired her so much that he transformed himself into a swan as well, and was reunited with her. She then followed him back to his palace on the River Boyne.
Other Names
Angus, Oengus, Aonghus, Mac Óc, Macc Ócc
Angus Óg, Angus Oc, Angus Mac Oc

On St. John's Eve, wisps of straw are burned in her honor. She is often invoked against sickness, and by legend, she was raped by the king of Munster.

Badb was the daughter of Delbáeth and Ernmas, and sister of Macha, Morrígan, and possibly of Nemain. Badb was the wife of Neit.

Boann had an affair with Dagda (usually referred to as Eochaid Ollathair), during her husband's absence. Dagda had her husband on a mission. Elcmar thought the journey took only one day and one night, when actually nine months passed, because Dagda used his power to hide Boann's adultery and pregnacy from Elcmar. By Dagda, Boann became the mother of Angus Óg (and possibly of Brigit). Elcmar unknowingly became foster father of Boann's son. According to Aislinge Óenguso (Dream of Angus), Boann was actually seen as Dagda's wife.
Other Names
Boann, Boanna, Boinn, Bóand.

Bodb was king of the Sid ar Femen and Sid na mRen (Sileveramon) In the story of Aislinge Oenguso (Dream of Angus), he was the king of the Sid Mumu. While in the Togail Bruidne Da Derga (Destruction of Da Derga's Hostel), his domain was in Sid ar Femuin (well at least Bodb's swineherd lived there. In the Acallam na Senórach, Bodb Derg was the king of Bruig of the Boyne (Newgrange), an Otherworld domain. Bodb lived with 150 sons of kings. Though Bruig was usually said to be his father (Dagda) or his brother Angus's domain.

Bres was the son of the Danann woman, named Eriu or Eri, and of Elatha, the king of the Fomorians. Elatha was the son of Delbáeth and grandson of Neit. Bres' name was actually Eochu; that is Eochu Bres, which mean "Eochu the Beautiful".

Brigit was sometimes identified with the goddess Danu, the mother goddess of the Danann, but this would cause even greater confusion in already confusing genealogy. Birgit was normally said to be the wife of Senchán Forpeist, though in another version, she had mated with Bres, one of the Danann kings, and became the mother of Rúadan. Her son Rúadan tried to murder Goibhniu for his father, but the smith killed the youth. Her lament for son was the first kenning to be heard in Ireland. Brigit was also the mother of Brian, Iuchar and Iurbarba. Some say she was the mother of Creidhne (artificer), Luchta (carpenter) and Goibhniu (smith), the three master-craftsmen, though Goibhniu was usually called the son of Danu and Dian Cécht, and Luchta was the son of Luchad. Brigit was also said to have a grandson named Ecne. Her name was also spelt, Brigid, means "High One" or the "One Who Is Exalted". During the time of Roman power, Brigit was identified with Brigindo or Brigandu in Gaul, while she was called Brigantia, after the Celtic tribe living in northern England.

Dagda was the chief leader and god of the Tuatha Dé Danann, and was the father of many children. Other sons included Bodb Derg, Aed Minbhrec (or Aed Cáem), Cermait Milbél ("honey-mouthed") and Midir. He was also the father of two daughters: Brigit and Ainge. Dagda was described as a huge and stocky man, with superhuman strength as well as superhuman appetite.

Some believed that Danu and Ana were separate entities, although both are mother goddesses. Danu was widely worshipped as mother goddess throughout Europe. She married her consort Bilé (Bile), and was the mother of Dagda, who was the chief leader of the Tuatha Dé Danann. With Dagda, Danu was also the mother of Ogma. Danu was also known by another name - Brigit.

Here, as Ana or Brigit, she was known as the daughter of the Dagda. She was mother of three sons; all of them were named Ecne.In some of the sources, Danu or Ana was the proper name of the war-goddess Morrigan.In Munster, Danu was associated with two round-topped hills, which was called Da Chich Anann or the Paps of Ana, because they resembled two breasts. Da Chich Anann literally means the "two breasts of Ana".

The Celtic god of healing, Dian Cécht was the great physician of the Tuatha Dé Danann. There is a lot of confusion over his parentage. Dian Cécht was said to be the son of Esarg and grandson of Neit. This makes Dian Cécht the brother of Goibhniu, Luchne and Creidne. He had also being named as the son of Dagda.

Donn was an Underworld god responsible for the passage of the dead. He was known as the Irish god of the dead and was mainly worshipped in Munster. Donn was probably associated with Dis Pater (Pluto or Hades), the Roman god of the dead. According to Julius Caesar, all Celtic people were descendants of Dis Pater.
Other Names
Donn - "Dark One"
Donn (Irish)
Dis Pater (Roman)

Eriu was possibly another aspect of Morrigan. Again, Eriu appeared as the goddess of fertility. Eriu was the sovereignty of Ireland wedded to a mortal king. Like all her previous aspects mentioned, Eriu was also a war goddess and had the ability to change her shape from a girl to a hag, or to bird or animal. Eriu was the patron goddess of the province Meath. Ireland was probably named after her (Eire).

Goddess of the forest, hunting and wild beasts. Flidais was not only the huntress of wild animals, she was also their protector. Flidais was the mistress of stags, who had chariot pulled by deers. Flidais was the mother of several daughters, who were druidesses or witches, such as Bé Chuille, Dianann (Dinand), and Bé Téite, and Fand; the last daughter being the wife of Manannán Mac Lir. Both Bé Chuille and Dianann aided the Tuatha Dé Danann against the Fomorians, in the Second Battle of Mag Tuired. They used their sorcery to create illusions. Flidais was also the fertility goddess, the only one beside Queen Medb of Connacht, who could satisfy Fergus Mac Roich. Otherwise, Fergus would need seven ordinary women in his bed.
Other Names
Flidais, Flidas, Flidhais, Fliodhais.

Goibhniu was one of three divine craftsmen; they were known as na tri dée Dána. The other two craftsmen were Credne and Luchta. He also possessed the Mead of Youth. Goibhniu was known as the son of Dian Cécht and Danu. Goibhniu had two brothers: Cian or Kian (father of Lugh), and Sawan. Sometimes, he was called the son of Esarg and grandson of Neit, which make him the brother of Credné, Luchta and Dian Cécht. Goibhniu was also known as the son of Ethliu, which makes him the brother of Dagda, Nuada, Dian Cécht, Credne, Luchta and Lug Mac Cein. He raised Lugh, teaching the boy many different skills in his crafts.

One day, pretending to take the stepchildren to visit Bodb Derg, her foster father, Aiofe transformed the children into swans. Aiofe also placed a terrible geis on her stepchildren, so they would wander through Ireland and Britain for nine hundred years. When Bodb Derg discovered Aiofe's action against her stepchildren, Bodb turned her into a demon.

As a tripartite goddess of war, Macha was one of the three aspects of the Morrígans. Macha died with her husband in the Second Battle of Mag Tuired (Moytura); they were killed by Balor's destructive eye. However, Macha was most popular and active in her roles in the northern province of Ulster (Ulaid). Macha appeared twice in the Ulaid Cycle.

Manannán was also married to Aife (Aiofe), who had been transformed into a crane. Aife was killed and her skin was used to create a magic treasure bag, which would later belong to Finn and the Clan Bascna in the Fenian Cycle.

Goddess of war and fertility. Her name, Morrígan, means the "Queen of Demons" or the "Phantom Queen". Morrígan was the daughter of Delbáeth and Ernmas. Morrígan was the sister of Badb, Macha, and possibly of Nemain. Morrígan was one of the wives of Dagda. During the festival of Samhain, held on November 1, she would sleep with Dagda, to renew the future prosperity of Ireland. In this role, she was seen as the Sovereignty of Ireland. Morrígan was also the godddess of divination and prophecy. In Cath Mag Tuired, she was washing clothes at the ford in Unshin in Corann, near Dagda's house at Glen Edin, when Dagda encountered her on the eve of the Samhain festival. One foot was at Allod Echae (water in the south) and the other foot at Lisconny (north of the water). After Dagda slept with her, she advised him of where the Fomorians were gathered and what she would do in battle. It was from Morrígan that other Celtic folklore had derived the Washer at the Ford. The Washer was sort of like a banshee, who was able to predict who would die. In several sources, Morrígan had children, some by Dagda, and sometimes the father or fathers of her children were never named.

Morrígan had also been identified with the goddess Danu or Anu, or that Danu was Morrígan's proper name, since both were named as the daughter of Delbáeth and Ernmas. And both were the mothers of Brian, Iuchar and Iurbarba, through incest with their own father.

Morrígan was one of the strangest deities of Irish myth. She was a tripartite goddess of war: goddess with three separate personalities or aspects. The three morrigans were Morrígan, Macha and Badb. Some say that there are three separate goddesses (morrígans) with the same name, or that her three aspects were combined into a single goddess.

In the Second Battle of Mag Tuired (Moytura), Morrígan helped the Tuatha Dé Danann, causing fear and confusion in the Fomorian ranks. With the single combat between Ogma and Indech (one of the Fomorian kings), Morrígan drained the strength from Indech.

At the end of the book, she proclaimed that the Tuatha Dé Danann won a great victory over the Fomorians. In the tale of the Destruction of Da Derga, Morrígan caused Conaire Mor to break his last geis (taboo). Morrígan was also in love with Cú Chulainn, and appeared as a young beautiful maiden to him. However, Cú Chulainn rejected Morrígan's love. In the Cattle Raid of Cooley, Morrígan was one of the opponents who attacked Cú Chulainn at the ford, but each time, Cú Chulainn subdued or defeated her.

Though, she had become Cú Chulainn's enemy, in the end, she tried to save the hero. She sent a warning to Cú Chulainn, telling him of a death trap set by his enemies. When Cú Chulainn tied himself to a rock, dying from his wounds, Morrígan, in the form of a raven, sat perched on his shoulder, which kept the enemies at bay. Only when his life slipped away did Morrígan fly away.

Neit may also have been the consort of Morrígan. He was married to Badb and Frea and was also said to be the father of Esarg, who was the father of the Danann physician, Dian Cécht.

Dian Cécht (Dian Cecht), a great physician, replaced Nuada's hand with a magical silver hand. Nuada then became known as Nuada Airgedlámh (Nuada of the Silver Hand). With a new hand, the Dananns willingly accepted Nuada as king, and had Bres removed from the throne. Bres however reconquered Ireland, aided by his grandfather Balor, the Fomorian leaders. The Dananns then had to suffer from oppression from the Fomorian overlord, until the arrival of Lugh, son of Cian (Kian). Lugh sided with Nuada in the second battle of Moytura (Magh Tuiredh). During the battle, Balor killed Nuada. The Fomorians were defeated when Lugh killed Balor with his sling. Nuada was said to be father of Murna of the White Neck, mother of the hero Finn MacCumhaill.

Also known as the Irish god of writing, eloquence and poetry, Ogma was credited with being the inventor of the Celtic writing systems that the Druids used for their magic. These were known as Ogham.