It's not called "Moldbug OS". Urbit is a nice, succint, short name that can be pronounced and remembered, which is a commodity in short supply.
Yarvin/Moldbug's blog is titled "Unqualified Reservations" and is stylized as "UR" written in a serif font.
Changing the name and cleaning up the obscurity would be a genuinely good idea, but personally I'd prefer for this project to just die in obscurity. I don't think there is anything redeemable here, and the shitshow that follows every time it's brought up is exhausting.
An openly racist, far right blog. By an author who has stated that he believed some races were more suitable for slavery (he also seemed to have no problem with slavery of course) and that some races have genetic superiority to have better IQs.
(Just added it since I thought you forgot mentioning it)