At birth, Victoria was fifth in the line of succession after the four eldest sons of George III: the Prince Regent (later George IV); Frederick, Duke of York; William, Duke of Clarence (later William IV); and Victoria's father, Edward, Duke of Kent. The Prince Regent had no surviving children, and the Duke of York had no children; further, both were estranged from their wives, who were both past child-bearing age, so the two eldest brothers were unlikely to have any further legitimate children. William and Edward married on the same day in 1818, but both of William's legitimate daughters died as infants. The first of these was Princess Charlotte, who was born and died on 27 March 1819, two months before Victoria was born. Victoria's father died in January 1820, when Victoria was less than a year old. A week later her grandfather died and was succeeded by his eldest son as George IV. Victoria was then third in line to the throne after Frederick and William. William's second daughter, Princess Elizabeth of Clarence, lived for twelve weeks from 10 December 1820 to 4 March 1821, and for that period Victoria was fourth in line.