Cognomen Seilan (Seilan 
, Сейлан 
) , throughout the world, is a very rare surname. The cognomen Seilan is habitual in Georgia, where it is a rare surname, Malaysia, where it is a very rare surname, and Kyrgyzstan. Not in comparison with a country's population, it most frequently occurs in India, Georgia, and Russia. Likewise, Seilan is the forename as well as the last name.