Surname Ooman (Ooman 
) , around the world, is a very rare cognomen. The cognomen Ooman is habitual in Estonia, where it is a rare surname, Canada, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Estonia, the United States, and India. Also, Ooman is the forename as well as the last name.