Fairy king of Irish tradition, known as early as the 16th-century text of Echtra Fergusa maic Léti [The Adventure of Fergus mac Léti]. For a king, he suffers many humiliations. Eisirt, Iubdán's court poet, tells him that Ulster is a land of giants to deflate his boasting, and to prove his point brings home a dwarf, Áeda (1), who seems a giant in the fairy court. Eisirt then lays a demeaning geis on Iubdán, requiring him to travel to Emain Macha so that he may be the first there to eat porridge in the morning. As Eisirt correctly predicted, Iubdán clumsily falls into the porridge, is captured, and is kept prisoner for a year. In the bawdy Aided Fergusa [The Violent Death of Fergus], Fergus mac Léti has a grotesque adulterous affair with Bebo, Iubdán's wife, his greatest concern being that his male member is larger than she is. Fergus tells Iubdán of his pleasure with Bebo, but not until the fourth time does Iubdán condemn his lust. Later, Fergus captures both Iubdán and Bebo and will not release them until Iubdán surrenders his most prized possession, which is revealed to be a pair of enchanted shoes, allowing the wearer to walk on water. When Fergus puts them on, the shoes swell to fit his feet.