Well, a significant theme is the relationship between humans and the supernatural. In many old Irish legends stories, we see humans interacting with gods, fairies, and other magical beings. Family and loyalty also play important roles. For example, in the story of the Children of Lir, their loyalty to each other despite their transformation is a key aspect. And of course, there is often a theme of adventure, as the characters embark on quests and journeys filled with danger and discovery.
The theme of fate often plays a role. Characters are sometimes fated to certain things, like the long - awaited return in 'The Voyage of Bran'. And of course, there are themes of good versus evil. The heroes in these stories usually fight against some form of evil, whether it's a tyrannical king or a malevolent sorcerer.
One main theme is magic. The fairies in these stories possess all kinds of magical powers, like turning people into animals or creating illusions. Another theme is nature. The fairies are closely related to nature, living in forests, near rivers or in mounds. For example, in many stories, the fairies' power is connected to the seasons and the growth of plants.
One common theme is revenge. Many ghosts in these stories are seeking revenge for some wrong done to them when they were alive.
The story of Cú Chulainn is a classic old Irish legend. Cú Chulainn was a heroic figure with extraordinary combat skills. His feats in battle and his code of honor are central to the story. There are also stories about the Tuatha Dé Danann, the mythical race in Irish lore who were said to possess great magic and power.
Love and loss are probably common themes. Ireland has a rich history of stories about unrequited love or the pain of losing someone dear. Also, Irish identity, like what it means to be Irish in different historical and cultural contexts.
One main theme is the power of love against social norms. In many stories, like Diarmuid and Grainne, their love goes against the arranged marriages and social expectations of the time.
Brian Boru is another main hero. His victory at the Battle of Clontarf against the Vikings made him a significant figure. He united the Irish kingdoms to a large extent and his leadership in war was crucial for the Irish in that era.
In the story of Diarmuid and Gráinne, the main characters are, of course, Diarmuid, a brave and handsome warrior, and Gráinne, the beautiful daughter of a king. Fionn Mac Cumhaill also plays a significant role as Gráinne's betrothed, who chases after the two lovers.
The 'Banshee' is extremely popular. It has been part of Irish folklore for centuries. Its wail is a sign of impending doom, and many people claim to have heard it in areas with a long history of tragedy or near ancient burial sites.
They often involve magic. For example, in many stories there are magical creatures like fairies, banshees or selkies. These elements add a sense of wonder.