Daub is very likely staves. These are the retaining rings that hold together the many individual boards of a drum, so that a vessel is formed with a large capacity realtiv. That means in a figurative sense, many individual aspects to a whole put together, so much content that is stored and can be drawn from it in individual portions. In most cases, the namesakes the need to be a great overview of an overall context in which it will benefit himself and he can continue to give to others. This results as a "knowledge base" that can be represented in material form.
(Sent from: Birgit Daub)
