In 1198, King Henry II of England invaded Ireland and gave the part of it he controlled to his son John as a Lordship when John was just 10 in 1177. When John succeeded to the English throne in 1199, he remained Lord of Ireland thereby bringing the kingdom of England and the lordship of Ireland into personal union. Successive Kings of England also had the title of Lord of Ireland until the title was abolished by Henry VIII, who was made King of Ireland by the Parliament of Ireland by the Crown of Ireland Act 1542.
Edward III was King of England from 25 January 1327 until his death; he is noted for his military success and for restoring royal authority after the disastrous and unorthodox reign of his father, Edward II. Edward III transformed the Kingdom of England into one of the most formidable military powers in Europe. His long reign of fifty years was the second longest in medieval England and saw vital developments in legislation and government - in particular the evolution of the English parliament - as well as the ravages of the Black Death.
The Royal style of King Edward III was "Rex Angliae, Dominus Hiberniae et Dux Aquitaniae" (King of England, Lord of Ireland and Duke of Aquitaine) to 1340, then "Rex Angliae et Franciae et Dominus Hiberniae" (King of England and of France and Lord of Ireland).