When I was growing up, my dad had some sort of email server or ftp server or something for the university he taught at. I have childhood memories of trying in odin@[university].edu. My first fileserver at home was just called The Vault, but when I put together a dedicated VM server, it became Odin. The long term VMs that I host on there are named after some of the lesser Nordic gods. I also have a Pi running NginX for reverse proxy passing, so after the latest season finale of Loki, that seemed like an appropriate name for that device.