Family name 吉根 (吉根 
, Jigen 
, Guegan 
) , globally, is quite a common cognomen. The last name 吉根 is habitual in Jersey, where it is quite a common surname, France, and Belgium, where it is a rare surname. In absolute terms, the name is most common in France, China, and the United States. Much less frequently, 吉根 is the forename as well as the last name.