Cognomen Харкер (Harker 
, Харкер 
) , worldwide, is a common last name. The cognomen Харкер is habitual in Isle of Man, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and New Zealand. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and South Africa. Much less frequently, Харкер is the forename as well as the last name.