Cognomen גרגו (Grago 
, גרגו 
) , all around the world, is a rare family name. The last name גרגו is habitual in Israel, where it is a rare surname, the United States, where it is a very rare surname, and Australia. Measured by absolute frequency, it is commonest in the United States, Israel, and Colombia. Much less frequently, גרגו is the forename as well as the last name.