England became elective only under the imbecile. Only he got the title because, as I said, the former English king was too busy having wars to listen to my old ruler telling him facts about his quickly disintegrating realm. Had it not been for the imbecile, I would probably have had vassals like me more, wouldn't have had to lower the crown authority and England would now be a primogeniture like any other civilized kingdom.
Curious by the way, have you found any historical characters from different eras? I know that at least el Cid exists, and traced Alexander Nevsky down today. Then the kings are probably all historical when the game starts. Habsburgs exist as a dynasty, or so I've heard: I think they start as counts. Any others?