Edmund the Martyr died on 869-11-20.
Edmund the Martyr was born in 841.
Edmund's relics are at Beodricsworth (modern Saint Edmundsbury), England.
Yes. He was a Martyr.
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.
Sarah the Martyr died in 303.
Weston Martyr died in 1966.
Romulus - martyr - died in 112.
Harold - martyr - died in 1168.
Charbel - martyr - died in 107.
Zosimus - martyr - died in 110.
Orentius - martyr - died in 304.
Sophia the Martyr died in 137.