Wiktionary says that the Italian verb "andare" might come from suppletion of "vadere" with another Latin verb. But it goes on to say that another possibility is the dissimilation of "ambulare". I think it gives even more possibilities.
Could anyone verify and perhaps elaborate on these possibilities? I do not know very much about phonological changes, and terms such as suppletion and dissimilation. If anyone could give a compelling story or two on how "andare" came to be, it would be much appreciated.