] The book does not give an etymology for Vindobona.

But I found one in the Encyclopedia Britannica Online. It's Celtic:

Traces of human occupation of the site of Vienna have been found dating as far back as the Paleolithic period. The area was subsequently inhabited by the Illyrians and then the Celts. In 16-15 BC the Romans, under the future emperor Tiberius, occupied the foothills of the Alps, and in the next century the Celtic town of Vindobona (Celtic: "White Field"; later to become Vienna) became a strategic Roman garrison town.