Because was a martyr.
The Danes captured Edmund alive and attemped to forced him to give up his Christian beliefs. Their intent was force his conversion to their religion, and then turn his kingdom into a vassal state of their own. Edmund refused, and was then shot to death by Danish arrows for his beliefs.
Since he clearly died for the Christian religion, he is a martyr and was then canonized a saint.
St. Edmund was made a saint due to his martyrdom and his reputation for piety, chastity, and humility. He was also known for his devotion to God and his willingness to die for his faith rather than renounce Christianity.
There are a number of saints named Edward. However, St. Edward the Confessor was declared king of England. To learn more about this saint click on this link.
There are a number of saints named Edward so you will need to be more specific. Here is a partial list:
Edward Bamber
Edward Coleman
Edward Fulthrop
Edward Helmes
Edward James
Edward Oldcorne
Edward Poppe
Edward Powell
Edward Reding
Edward Shelley
Edward Stransham
Edward the Confessor
Edward the Martyr
Edward Waterson
There are a number of saints named Edward so you need to be specific.
saint edward the confessor
St. Edmund the Martyr is buried in a shrine at the Abbey Church of St. Edmund in Bury St. Edmunds, Suffolk, England. His relics were translated there in the 10th century.
Because that is the day when Saint Edmund (also called St. Edmund Rich or St. Edmund of Abingdon) is said to have died. The confusion is that there are two saints named Edmund. The one you are asking about was also Archbishop of Canterbury. He was born on November 20, 1180, which was the feast of the other Edmund, St. Edmund King and Martyr. But they are not the same person, and their feast days are on different days-- St. Edmund the Martyr's in observed on the 20th of November, while St. Edmund of Abingdon has his feast day on November 16.
The patron saints of wolves are St. Edmund of East Anglia and St. Ailbe.
Edmund is a saint, but not a patron saint.
Edmund Arrowsmith is not a patron saint.
Saint Edmund Campion was born on January 24, 1540, at London, England.
Society of Saint Edmund was created in 1843.
St Edmund's Chapel was created in 1253.
Caistor St Edmund's population is 270.
Sutton St Edmund's population is 630.
St Edmund's School was created in 1749.
Edmund was a Catholic.