I don't think you can drop the word "mon" into a conversation and be readily understood without additional explanation; what you want is "monshō" (紋章) to talk about heralds in general.

Quick visual on some mon:

https://mon.xavid.us/

https://en.wikipedia.org/wiki/Mon_(emblem)

> Visual-Identity Generators

This makes me think of user-avatar scenarios, like systems that automatically make an abstract design linked to an anonymous user's IP.

If the possibility space is big enough, old heraldry rules could be applied the same way—though old families might not appreciate seeing "their" design randomly appropriated.

There was a really cool project a few years ago from Area Tech that explored this - generative shields (with heraldry on them). https://shields.build/

Tangent, but I deeply appreciate the treatment of footnotes on this article, just floating alongside the text in the right gutter instead of at the bottom of the article. It seems so obvious (at least on desktop) but I haven't seen it before. It's so nice to be able to see whether it's something I want to read, or just a citation, without clicking and losing my place (yes, I know there's usually a link back to the article flow, but especially in the "sticky header" era we've been in for decades, that rarely works well).