The logo is a variant of the ancient Coat of Arms of Nigtevecht, a former Dutch municipality, as a reference to my family name "van Nigtevecht".
In the 1990s, I saw an old drawing of the coat of arms with the keys pointing down, described as a very old version no longer in use. Whether true or not, I have since used this unconfirmed ancient version with "NIGTEVECHT" and keys pointing down, out of respect for the original design used by the family "Huydecoper, Lord of Nigtevecht" and the formerly royal acceptance of the municipality's coat of arms. The coat of arms fell out of use after a municipal merger in 1986.
In 2019, I began using this version with keys pointing down as the site logo, together with the name "Powerful Signature".
The following articles are just some interesting and peculiar backgrounds about the Coat of Arms and family names, the history of the areas and some curious, questionable histories. In the 90s I saw a Coat of Arms of Nigtevecht with the keys pointing down; it was mentioned as an "ancient version". This information is no longer available on the web. If anyone still knows where to find it, please let me know!
The Coat of Arms still exists above the door of the former town hall (Raadhuis) at Dorpsstraat 142 in Nigtevecht.