Sorry, one last question if you don't mind.
So this was basically a document that was added to, over time (and perhaps even by different record keepers) and not done all at one time.
For example, when the document was first started, Theodorus was 66(?) years old, Lucia was 59, etc. and each of his grandchildren (from Nicholas and Wilhelmina) were added to this document when they were born, done so over the several years.
In other words, by the time the last child was added, in 1847, Theodorus would have been (at least) 72 because the first child was listed in 1846 and who knows how many years before that, this document was started.
Is that about how these registries worked?