Novgorod
Vassal of Bulgarians: Volkhov župa (or zhupa, županija); Novgorod Comitatus
Vassal of Prussians: Novgorodian Ballei
Vassal of Germany: Freie Stadt of Novgorod
Vassal of Polish/Lithuanians: Novgorod województwo ["voivodeship"]
Vassal of Muscovites: Novgorod Land;
Vassal of Muscovites: Zavolochye or Dvina land [if control NE part of map, but lose Novgorod]
Vassal of Kievans: Volkhovskaya Rus', Privolhov'e
Vassal of Byzantines: Outside Rus'
Vassal of Arabs/Cordoba/Moroccans: as-Slawiya;
Vassal of Ottomans: Eyalet/pashalic of Ingria; Novgorod regency
Vassal of Danish/Norwegians: Garðaríki/Gardariki/Gardarike/Garðaveldi [before the 13th century]
Vassal of Danish/Norwegians: Holmsgardr/Holmgarðr [if control only Novgorod];
Vassal of Danish/Norwegians: Bjarmaland/Bjarmland/Bjarmia [if control NE part of map, but lose Novgorod, before the 13th century]
Vassal of Swedish: Swedish Ingermanland/Ingria or simple Ingermanland/Ingria/Izhora/Izhera;
Vassal of Swedish: Kexholms län; County of Viborg; Kexholm County [if capital in Karelia];
Under Merchant Republic: Novgorod Republic
If Islamic state: Novgorod khanate, The Karelian Muftiate
Under Paganism+Tribal Law: Ilmen Slavs
If capital moved to far east: Vyatskaya Veche Republic
If capital moved to Pskov: Pskov Republic
Empire sizes: His Majesty (or Sovereign) Lord Novgorod the Great" (Gosudař Gospodin Velikij Novgorod)/Lord Novgorod the Great
If theocratic state: Diocese of Novgorod
Kiev
Vassal of Bulgarians: Dnieper/Kiev župa/zhupa/županija; Kievan Comitatus [First Bulgarian Empire]
Vassal of Bulgarians: Kievan Despotate [Second Bulgarian Empire]
Vassal of Germany/Prussians: Kleinrussland; Russia/Ruthenia minor
Vassal of Germany: Kiew Reichskreis
Vassal of Polish/Lithuanians: Red Ruthenia/Rus'/Russia; Russia Rubra; Cherven Cities; Ruthenian Voivodeship
Vassal of Polish/Lithuanians: Jagoldai/Jaholdaj/Jahołdajewszczyzna [if Islam]
Vassal of Polish/Muscovites/Lithuanians: Dzikie pola/Dikoe Pole/Dykra (Wild Fields) [sparsely populated cities]
Vassal of Muscovites/Ottomans/Polish: The Cossack Hetmanate(Zaporizhian Host) [under Militarism + Orthodox]
Vassal of Muscovites: Levoberezhnaya Ukraina (Left-bank Ukraine) [Polish control Right-bank Ukraine]
Vassal of Polish: Prawobrzeżna Ukraina (Right-bank Ukraine) [Muscovites control Left-bank Ukraine]
Vassal of Muscovites: Novorossiya [control 4 and more provinces]
Vassal of Muscovites: Little Russian Office [1622AD-1722AD]
Vassal of Muscovites: Collegium of Little Russia [1722AD-1775AD]
Vassal of Muscovites: Kiev Viceroyalty(namestnichestvo) [after 1775AD]
Vassal of Muscovites: Government of Malorossiya [after 1796AD]
Vassal of Hungary: Kievan Comitatus [early game]
Vassal of Hungary: The Principality of Galicia–Volhynia; Kingdom of Ruthenia [mid game]
Vassal of Hungary/Austria: Rex Galiciae et Lodomeriae [late game]
Vassal of Novgorod: Kiev volost'
Vassal of Byzantines: Μικρὰ Ῥωσ(σ

ία
Vassal of France/Burgundy: la Petite Russie
Vassal of Arabs/Cordoba/Moroccans: Kuyaba/Kuyavia
Vassal of Ottomans: Yedisan; The Danubian Sich [capital in Moldova]
Vassal of Ottomans: Podolya Eyaleti, Kamaniçe Eyaleti/Eyalet-i Kamaniçe[capital in Podolia]
Vassal of Ottomans: Kiev Eyaleti [other]
Vassal of Danish/Norwegians/Swedish: Kœnugarðr
Under Despotism + Tribalism + Paganism: The Polans/The Drevlians
If Catholic: Kingdom of Rus
Capital moved to west (respawn in 1199AD): The Kingdom of Galicia–Volhynia
As Ortodox theocratic state: Mi(e)tropolia Kyiv and All Rus
As Catholic theocratic state: Ecclesia Ruthena unita/Russian Uniate Church
If Islam: Rurikids sultanate