:::: See how tempting it is to do original research? -D My search used the ICANN.org search window: here and here. Note that both means also return results for host-name and host_name, which I'm not suggesting are correct but underscore the power of entropy. My reading of WP:ENGVAR is that its intent is to respect language variations, for example between British and American English. It was never intended to defend or preserve misspellings in Wikipedia, which is a better way to describe what's under consideration in this case.