I suspect that the correct name is "Sampson"

The name that Grove and I read from the handwritten documents as "Samplon", is almost certainly "Sampson", instead. The handwritten name looks something like "Sampfon", where I put an "f" being a 17th Century, lower-case "s". That is why Brandt wrote the name as "Samson" (actually, something like "Samfon", without the cross on the "f"). The Dutch seem to have written the name as either "Samson" or "Sampson", interchangeably. I will look again at the handwritten text, but this is my current estimate.