Last name Sydar (Sydar 
, Сидар 
) , across the world, is a very rare family name. The family name Sydar is characteristic of Kyrgyzstan, where it is a very rare surname, Nicaragua, and Russia, where it is an extremely rare surname. In absolute terms, this name is the most popular in Russia, India, and Kyrgyzstan. Likewise, Sydar is the forename as well as the last name.