Why was Edward I not Edward IV as he followed Edward the Elder, Edward the Martyr & Edward the Confessor?
The practice of using Roman numerals to distinguish kings and queens started only after there had been several with the same name, and particularly when there was a succession of father, son, grandson like Edward I, Edward II, and Edward III. Before then it was common for chroniclers and historians to use sobriquets such as Edward the Elder, Edward the Martyr, Edward the Confessor, Edmund Ironside, Aethelred the Unready, Alfred the Great, Harold Harefoot etc before this became impractical.
