Byzantines: Tagmatas (Cavalier Equivalent) / Cataphracts (Cavalier Equivalent) / Scholae Palatinaes (Paladin Equivalent)
Magyars: Knights / Lovagoks (Cavalier Equivalent) / Winged Hussars (Paladin Equivalent Mercenaries)
Burgundians: Chevaliers (Cavalier Equivalent)
Poles: Sclachtas (Knight Equivalent) / Husarias (Cavalier Equivalent) / Rycerze (Paladin Equivalent)
Bohemians: Rytiris (Cavalier Equivalent) / Reichsritters (Paladin Equivalent)
Bulgarians: Bagain, Bagatur, Boil, Tarkhan (Knight Equivalent)
Aztecs: Eagle Warrior & Jaguar Warrior (Knight Equivalent) / Xolotl Warrior (Cavalier Equivalent)
Armenians: Azats & Nakharars (Knight Equivalent) / Ayrudzis (Cavalier Equivalent Similar to Cataphract)
Georgians: Aznauris (Cavalier Equivalent Similar to Cataphract) / Monsapas (Paladin Equivalent)
Sicilians: Cavaleris (Cavalier Equivalent)
Franks: Knights / Chevaliers / Paladins
Italians: Knights / Cavalieres / Paladinos
Britons: Knights / Cavaliers
Teutons: Ritters / Kavaliers / Ritterbruders
Spanish: Knights / Caballeros / Paladins
Portuguese: Knights / Cavaleiros / Paladinos
Persians: Aswarans (Knight Equivalent) / Katafraktos (Cavalier Equivalent Similar to Cataphract) / Savars (Paladin Equivalent)
Slavs: Boyars (Cavalier Equivalent) / Vityaz (Paladin Equivalent)
Japanese: Samurai (similar role, different cultural context)
China: Youxia (Knight Equivalent) / Tieqi (Cavalier Equivalent Similar to Cataphract)
Romans: Equites Cataphractarii (Cavalier Equivalent Similar to Cataphract) / Centurions (Paladin Equivalent)
Hindustanis: Rajput Warriors (Cavalier Equivalent)
Saracens: Mamluks (Knight Equivalent)
(NOTE: Theoretically, you can put Cataphracts and their Clones as Cavalier Replacements in them Civilizations because they had the same Social Structure, Duties, etc,. This includes Romans, Armenians, Georgians, Chinese, Persians, Byzantines).
Knights were elite warriors in many cultures, often associated with chivalry, honor, and military prowess & social class. They all had a Unique Hierarchy.
Only Portuguese, Spanish, Italians & Franks had Paladins.
Huns & Cumans did not have Paladins. They used something else.
And there were comparable Paladins in the other Cultures.
Franks, Spanish, Italians, Portuguese are the only Empires to have Paladins or Paladinos. The Teutons, Celts, Lithuanians, Burgundians, Cumans, Huns & Magyars have no historical evidence of it, but have their own Versions. This makes them more Unique. Basically, the Latin Civilizations of Europe had Paladins or Paladinos.