Is there a website one can test names against? Of course you can locally but that doesn't easily cover the distros you might be thinking of targeting.
The closest (but not perfect) answer I know of is the open source project name checker (http://ivantomic.com/projects/ospnc/).
Repology (https://repology.org/projects/?search=what) can also help a bit, but it's less of a direct answer.