This is every monarch of a united England according to historic-uk.com as of 6/3/2020 A.D.
The link to my source is here:https://www.historic-uk.com/HistoryUK/KingsQueensofBritain/
Starts from the first king to establish a stable and extensive rule over all of Anglo-Saxon England.
Must include titles (eg. pious, great, cruel, etc.).
surely regnal numbers replace 'titles'? the whole point is to disambiguate. It's either William I or William the Conqueror but never William I the Conqueror. Doubly bad for his cousin, as the regnal numbers for his name reset.