One of my nameserver names is my actual name. Did I just get very lucky, or is Cloudflare doing this, based on the account info? In any way, I think it's nice :)
The assignment is random, depending on the region your Cloudflare account resides in.
If you want to read the backstory of the nameserver names, here is the blog post from 2013 on that topic: https://blog.cloudflare.com/whats-the-story-behind-the-names-of-cloudflares-name-servers/