Family name היום (Hume 
, היום 
) , in all the world, is a common surname. The cognomen היום is habitual in New Zealand, where it is quite a common surname, Reunion, and Australia, where it is quite a rare surname. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and India. Very seldom, היום is the forename as well as the last name.