Family name Istam (Istam 
, Истам 
) , in the entire world, is a rare cognomen. The surname Istam is characteristic of Kyrgyzstan, where it is a rare surname, Estonia, and India, where it is a very rare surname. Measured by absolute frequency, the name is most common in India, Indonesia, and Kyrgyzstan. Also, Istam is the forename as well as the last name.