Not only does your guardian have the gift of you, Mystery, but also the gift of writing beautifully! Considering that you were already neutered and your guardian had just moved in to the house, possibly you were left behind by the previous dwellers. Only you know, and you're not divulging, right? If all was known about your past then your loving guardian might have to change your name. Better to live up to it and retain the mystery. Wishing you and your best friend enjoy long, healthy lives together!