Family name Харлоу (Harlow 
, Harlou 
, Харлоу 
) , across the world, is a common last name. The family name Харлоу is characteristic of Saint Lucia, where it is quite a common surname, Reunion, and the United States, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in the United States, the United Kingdom, and Canada. Much less frequently, Харлоу is the forename as well as the last name.