Here's my comments to them.
It might be gossip, but it might also be true.
If it's true, it's of extreme relevance.
Remarkable that Jensma did not mention this in his book.
I hope you will add more from this source to your website.
"Nildon", which can either be called a negative verb or just a contraction of "ne wildon", is not exclusively Rustringian.
Old Westfrisian Laws (#55 or LV):
IEF HI NELLE,
Als hij niet wil,
If he (the magistrate) will not (do so),
SO NE ACH HIM NIMMA IOWA LADA NER BOTA,
zo acht hem niemand laden noch boeten te geven,
no man need tender him oaths or compensation,
NER NIMMA SINE BAN THELDA.
noch niemand zijne ban dulden.
nor obey his orders.
Why must "foddik" come from the Jordaan dialect of Amsterdam?
Because that dialect was studied by Halbertsma?
In that case, there is a similar mistake going on as with Rustringian.
I suspect that your reasoning is like this:
1. Halbertsma wrote the OLB.
2. He studied Rustringian and the Jordaan dialect.
3. The unknown word "foddik" must come from the Jordaan dialect.
It's interesting to know if "foddik" was part of the Jordaan dialect, but whether or not this is true, it does not add to the proof that Halbertsma did it.
In theory it's possible that the OLB was inspired by various languages and dialects, but it's equally possible (and in my opinion more likely) that those languages and dialects have similarities with the OLB language because the latter is indeed ancient, and they stem from it.
First, a correction:
You have confused two people with the same name:
Cornelis' aunt, Aafje Over de Linden (1798-1849) was married 1. to Hendrik Reuvers (1796-1845), 2. to Koop Meijlof (ca.1804-ca.1875)
The other Aafje (a.k.a. Antje) Over de Linden (1854-1924) was married to book printer and publisher Pieter Bais (1850-1926). This Aafje's father was a cousin to the second degree of Cornelis Over de Linden (1811-1874).
For a more complete and more accurate Over de Linden genealogy, see:
Second, and most importantly, you seem to have assumed that the manuscript was in the possession of any Over de Linden bookshop, as it does not say so in your quotes.
Conclusion: This is not an established fact.