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Cognomen Kaloyan (Kaloyan , Калоян , קיסר) , worldwide, is a rare family name. The family name Kaloyan is habitual in Bulgaria, where it is quite a rare surname, Armenia, where it is a rare surname, and Russia. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Russia, Bulgaria, and Ukraine. More frequently, Kaloyan is the forename as well as the last name.
Koev, Kanchev, Kamenov, Kirilov, Krastev, Ganchev, Lazarov, Todorov, Nikolov, Hristov, Vasilev, Mihaylov, Simeonov, Stefanov, Stoyanov, Stoychev, Atanasov, Dimitrov, Georgiev, Tsvetkov, Yordanov, Kaloyanov, Borisov, Angelov, Mirchev, Marinov, Kanev, Kolev, Kosev, Kirov, Penev, Popov, Dimov, Ganev, Tanev, Iliev, Kostadinov, Yanev, Kostov, Krumov, Pavlov, Petrov, Petkov, Dobrev, Tsonev, Nachev, Ivanov, Yankov, Stanev, and Aleksandrov