- "boyar": A hereditary title of high nobility, usually reserved for members of the most powerful and influential families.
- "knyaz": A title equivalent to "prince", usually reserved for members of the former ruling families.
- "graf": A title equivalent to "count", usually granted to foreign noblemen or to Russian noblemen who had achieved significant distinction.
- "baron": A title equivalent to "baron", usually granted to foreign noblemen or to Russian noblemen who had achieved significant distinction.