My mother-in-law married into McCorkell. Being the geneaology nut that she is, she has discovered, as I have, that McCorkell(or any of the other spellings) is a sept of both Gunn, and MacLeod. Is this correct? I mean is this possible?

Now, I personally have no Scottish ancestry that I know of. I am the husband of the daughter of said McCorkell by marriage, what, if anything, does this mean to me?