His dress somehow gives an aristocratic impression.

He was a so-called aristocrat by birth.

He's a genuine aristocrat.

He springs from a noble family.

I admire his aristocratic manners.

He was created a peer.

The king created him a peer.

The country was governed by a French noble family.

The aristocrat clings to the glory of his past.

This park used to be a hunting ground for a noble family.

Nobles do not exist merely because there is a peerage system. Even if there were no peerage system, there will be people who are naturally dominant and who will quickly rise to nobility. So much for our nobility then. Why, we are mere peasants.