Old Dutch naval button

[GTB]

I may have featured this button in the past but no harm in resurrecting again.

It is a small (15mm) brass/gilt old Dutch naval button with an intriguing backmark that has so far defied identification even by Dutch naval and shipping collectors.
The backmark is in script (handwriting) form and reads:'I (or J). v. d. x. amsterdam'.
Akin to late 18th century / early 1800s period.

Oddly enough, button was found locally in a pathway between fields and appears to have been flattened, but otherwise in good condition considering.

GTB

[Wmr-RHB]

I can only add the most obvious here, but I will do that nevertheless to give a kickoff to the investigation.

The below is of course about Dutch names.

J .v. d. X Amsterdam is most probably the manufacturer and the place.
J. is of course the surname, can be anything from Jan via Johan to Johannis.
The v. d. part is one of the very common expressions used in family names. Can mean "van de" or "van der" or "van den".
X as family name is bit strange. X is not letter often used in Dutch, certainly not in names, let alone as first one.

[GTB]

Thankyou, Henk,

As you say, these are all the most obvious but nevertheless a start. Apparently this maker is a puzzle for Dutch collectors as no record of a maker with these initials has been found. I wonder if he could have been a local tailor or naval outfitter, who ordered buttons produced by a contractor and put his name on the uniform buttons. This system is known to have flourished.

GTB

N.B. Another posibility is that the last initial letter of the name could be an 'e' (with a flourish).