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good question. He kind of looks like him, and it surley isnt Javier becuse he is mexican, but there is no way of knowing for the other two.

Mainly because he looks like him in 1914.

yea but he could still easily be dutch or bill's son. its assumed that hes johns son, and its the most likely possiblity, as he does look like him, among other reasons, but he could still be the son of one of the other two