Surname Lilak (Lilak 
, Лилак 
) , in all the world, is a rare family name. The surname Lilak is habitual in Ukraine, where it is a rare surname, Austria, and New Zealand, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Ukraine, the United States, and India. Likewise, Lilak is the forename as well as the last name.