CV3 Japanese manual: Over 100 years earlier... (百年余)
CVA Japanese manual: Dracula was still a sorcerer.
Was he still a sorcerer because this was the first time a Belmont confronted him or was he still a sorcerer because when Trevor defeated him, he wasn't actually defeated? If not for the IGA timeline, with both games' Japanese manuals considered, Trevor should be Christopher's father, Trevor failed to kill Dracula, Christopher defeated Dracula when he came back and then sealed him away, then 100 years later Dracula was resurrected as a demon. Trevor we know was in the 1400s, but what we don't know is when Christopher was actually around except by what IGA's crew retconned.
Either way, the real issue isn't whether Chris and Trevor are the same guys (Alucard never helped Christopher and all the games say Alucard, Sypher and Grant helped Trevor anyway, so this is moot discussion), but that Simon appears to have been placed in the wrong era. It seems more likely that Simon lived in the end of the 16th century, not the 17th century. The only way he could logically be living in the 17th century would be... Until I see the Japanese ending of CVA2, it says in the English one Soleiyu continued to fight Dracula even after Christopher had defeated him. So according to CVA2, Dracula still wasn't dead. Unless Trevor, Christopher or Soleiyu presumptuously had a tombstone engraved for Dracula thinking he was dead, according to the ending of a game made canon by IGA's crew, Dracula hadn't yet entered his 100 year cycle by the end of CVA2. That means Soleiyu battled Dracula at least one more time and THEN there was peace for 100 years in the English canon. (Update: In the Japanese ending, it just says he was a vampire hunter. They embellished inappropriately once again in the western version. Konami's western divisions need to learn to stop making up their own shit.)
And I said before, Trevor could have the middle name Christopher and his son could be Christopher if Trevor was a confirmed Catholic; confirmed Catholics had a given name, a Christened name, and a surname. Christopher might have not been confirmed or if he did we'll never know his middle name. Either way, it's not that uncommon for father and son or grandfather and grandson to share the same names. I'm named after my great-grandfathers (both of them) and there's even a tombstone with my name on it ... supposedly I'm already dead.