Macha, daughter of Sainrith mac Imbaith, was the wife of Cruinniuc, an Ulster farmer. After Cruinniuc's first wife died, she appeared at his house and, without speaking, began acting as his wife. As long as they were together Cruinniuc's wealth increased. When he went to a festival organised by the king of Ulster, she warned him that she would only stay with him so long as he did not mention her to anyone, and he promised to say nothing. However, during a chariot race, he boasted that his wife could run faster than the king's horses. The king heard, and demanded she be brought to put her husband's boast to the test. Despite being heavily pregnant, she raced the horses and beat them, giving birth to twins on the finish line. Thereafter the capital of Ulster was called Emain Macha, or "Macha's twins". She cursed the men of Ulster to suffer her labour pains in the hour of their greatest need, which is why none of the Ulstermen but the semi-divine hero Cúchulainn were able to fight in the Táin Bó Cuailnge (Cattle Raid of Cooley). This Macha is particularly associated with horses—it is perhaps significant that twin colts were born on the same day as Cúchulainn, and that one of his chariot-horses was called Liath Macha or "Macha's Grey"—and she is often compared with the Welsh mythological figure Rhiannon.