[potential spoilers for planet names] How did the worlds in Delta Pavonis get their names?

The naming themes here almost seem all over the place, or maybe I don’t know about a couple of the inspirations. Some are named after scientists (or perhaps the units of measure named after some of these), but the moons of Arachna are named “Itsy,” “Bitsy,” and hilariously, “Worthless.” I also have no idea where the names of Nascent and its moons come from.