I second what others have said above, but also, I know a few people who have "road names" because they kind of/ really/severely dislike their real or first name.
But yea, since a) we don't get to choose our birth names, and b) most often they don't really fit our personality and/or are common enough, being able to referring to specific persons with a unique name is way helpful.
You can chose your own, to an extent. Like, you can't choose something that implies you're super duper cool or badass, unless you're a wad... But yea, you can make something up and go by it.
I know travelers whose names are colors, animals, random objects, their favorite beer brand, etc, etc
Have fun with it!
I go by 'eske' since my first and middle initials are S.K.
and 'karl' started as joke, but it's a play on my middle name, Korl, which I've gone by for most of my life.
In high school, my friends and people I sold weed to, used to call me 'Korl Reefer'.
I'm also in the process of changing my first and last names legally, so sometimes , while traveling, I introduce myself as my new first name.
I do it mostly as sort of a way of telling where or when I met someone. If I get a random text from someone saying,
"Hey Kay! How've ya been?!",
I know that more than likely it's someone I met while meandering around in Tennessee.