It is possible, but you have to weigh up the evidence for and against. Several of my ancestors changed their names at will, some with a valid reason, some without an obvious reason.
Nobody can give you a definitive answer, in this case if you feel strongly that it is a match, then (whether a Wikitree member or not) explain your reasons for believing it to be correct. In Wikitree this is in the biography, in your own family tree programme you should also state the uncertainties.
Something may turn up in the future to prove/disprove the theory. Have you looked for any relevant Wills?
Margaret