Well Juergen, on moving to the new server, the server hostname they gave me was even worse. It was grepnik.default.my-account-name.uk0.bigv.io
where my-account-name is my real name, trivially findable from every mail sent and every web page published on my server.
I had the option to set the reverse IP name to what I liked, except of course for it to work I'd have needed to register a new domain or use one of my web domains.
I had to open a new account, and still I get this name. On the bright side, it will NEVER be needed by any human to type in.