Feradach Dathí (died c. 445), also known as Nath Í, son of Fiachrae, son of Eochaid Mugmedon, was a legendary king of Connacht and High King of Ireland of the 4th century or 5th century. His given name was Feradach, and he was named Dathí (`quick`) for the speed he put on his armour. He was said to have made foreign conquests, and died after .....