Edward Courtenay (c. 1527- 1556) was an English nobleman. He was a first cousin once removed to Queen Mary I of England.
Mary created Edward Earl of Devon on September 3, 1553.
On October 1, 1553 Mary was crowned and the new Earl of Devon carried the Sword of State in the ceremony.
Suppose Queen Mary and Edward live many years beyond 1560.
Suppose Mary does not marry Philip II of Spain.
Instead she marries Edward Courtenay in 1553.
Their children are:
Prince Edward born 1554
Prince William born 1555
Prince John born 1557
What happens then?