This is another curious history related to de "Huydecoper van Nigtevecht " family about a forgotten war, a page on ( vlagblog.nl -Scilly Isles )mentions the following:
"In 1986, a symbolic peace treaty between the Isles of Scilly and the Netherlands was signed by Dutch ambassador Jonkheer Rein Huydecoper van Nigtevecht. This event ended a 335-year conflict, formally declaring peace centuries after the last Anglo-Dutch War had concluded, though a formal peace had apparently been overlooked."
There is also an explanation on the website of how they discovered the forgotten war in 1986:
"Roy Duncan, historian and chairman of the Isles of Scilly Council, wrote to the Dutch embassy in London to dispel the myth that the archipelago was still at war with the Netherlands. The embassy investigated and concluded that the myth was indeed based on truth (Whitelocke's letter)."
The 335-year war ended with zero casualties, a unique achievement. The absence of any deaths may also explain why it was forgotten in a corner of Britain. There was no formal declaration of war, and the peace went unnoticed. England was in turmoil during the Cromwell period and had other priorities. I think "The Long Boring Anglo-Dutch War" would be a more appropriate title!
You can read the full history on the vlagblog website; you have to translate the page to English. Really a nice piece of history! The name is mentioned on this site in full as “Huydecoper van Nigtevecht”, not “Huydecoper Lord of Nigtevecht”, as on the larger family Coat of Arms.
