But of course!

Depends on how one defines nobile, and how far back you go, as I believe the main country of my families ancestor, if you owned land, then you were considered a noble, and someone surely owned some land at some point.

In my city, if your family name ends with a vowel, you originally descend from nobles; if it ends with a consonant, from slaves.

The branch of my family that is from this city (the other branches are respectively from the mainland and from the deep south of the country) end in N, so I guess not lol

Definitely not noble in any sense of the word, and I wouldn't call it family either in the way that's supposed to be.

Technically

Chances are its somewhere in there. At the end of the day everyone is related to everyone else.