When his reign began in 1307, he was the eldest surviving son of Edward I
He was succeeded by Edward (II), his youngest surviving son from his 
first... [DOC] [TLE] Edward I - shakespeareandhistory.com [PAR] Reign: November 16, 1272 - July 7, 1307 (34 years) ... Edward Longshanks 
was born the eldest child of King Henry III and Eleanor ..... Once he realized that it 
was Edward, and not his son, Montfort knew that he was a dead man walking.