Cognomen Kotyrlo (Kotyrlo 
, Котырло 
) , in all the world, is a very rare family name. The cognomen Kotyrlo is characteristic of Eastern Europe, particularly Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Russia, Belarus, and the United States.