Cognomen 基根 (Keegan 
, Keagan 
, Kegan 
) , in the entire world, is a common surname. The family name 基根 is habitual in Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and New Zealand. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Ireland. Also, 基根 is the forename as well as the last name.