I don't remember the whole entomology of the self assumed "wiggs" moniker, suffice it to say it was convoluted and not at all intuitive.
My last name is Wiggins. My first Colonel in the Air Force asked me when I was a young 19 years old, "Airman Wiggins, can I call you "Wiggs"? I said, "Yes Sir". It's stuck ever since, in military, personal and getbig life. So, there you have it.