Responses
It is a spoiler, kind of ....
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It means there is another soul inside the body.
They explained the lore was that a middle name is something bequeathed by god tied to your very soul. The Fake Elena has a different soul so received a different middle name than the OG!Elena. It was one of the clues that was used in the earlier chapters that allowed Phil to understand what happened.
Oh!! Thank you for the information! ε=ε=(ノ≧∇≦)ノ
Can anyone tell me what the fake Ellen's middle name means? It said it's different from the og middle name. ╮(￣▽￣)╭