Livio Scremin, if you said for example of Moscow can't be a surname but what surname should he have? Rurikid or Moscovskiy? But as I saw parts of titles were added as surnames for example of Burgundy or of Brabant, so I thought that russian titles of Kiev, Vladimir or Moscow can be added as surnames, but Rurikid is also usually don't use as personal surname, its name of whole dynasty but not personal surname. But some Rurikid branches later began to use their titles as their personal surnames
