Surname Gapan (Gapan 
) , in all the world, is a rare cognomen. The cognomen Gapan is habitual in Philippines, where it is a rare surname, Israel, where it is a very rare surname, and Spain. Not in comparison with a country's population, it is the most numerous in Philippines, India, and Nigeria. Much less frequently, Gapan is the forename as well as the last name.