William and Kate? April Fools! But really, there is a royal baby … just not one that belongs to the oft-scrutinized couple of William and Kate! Peter Phillips (son to Princess Anne) and his wife Autumn have welcomed a second daughter. Isla Elizabeth was born on March 29th weighing 7 ponds, 4 ounces. She joins big sister Savannah (1) as the two great-grandchildren for Queen Elizabeth II.