Surname كولبي (Colby 
, Kolbe , Culpi 
) , all over the world, is a common last name. The family name كولبي is characteristic of Germany, where it is quite a common surname, Austria, where it is quite a rare surname, and the United States. Not in comparison with a country's population, it is commonest in the United States, Germany, and South Africa. Likewise, كولبي is the forename as well as the last name.