>
Surname Guigan (贵乾 , Guigan ) , around the globe, is a rare family name. The cognomen Guigan is habitual in Ireland, where it is quite a rare surname, Switzerland, where it is a very rare surname, and the United Kingdom. Measured by absolute frequency, it is the most numerous in China, Ireland, and the United Kingdom. More prevalently, Guigan is the forename as well as the last name.