I think the docs might be there for managers to double check.
On the Cornelis Knoetzen, SV/PROG 1 heritage, you'd have to be more specific about why you're asking that.
We tend to use either the earliest documented record if it's likely to be reiable eg baptism, or the most common usage in docs - putting all other versions in aka
We avoid anachronistic modernising /regularisation of spelling where we have a historic record of the actual usage that person would have recognised from the time s/he lived.