Cognomen Lachka (Lachka 
) , throughout the world, is a rare family name. The cognomen Lachka is characteristic of Eastern Europe, particularly Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Hungary, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Slovakia, India, and Morocco. Very seldom, Lachka is the forename as well as the last name.