Meaning: The surname 淦 (Gàn) originates from several possible sources. One theory suggests it derives from the name of a river, 淦水, where ancient inhabitants adopted the name as their surname. Another theory posits that it comes from the occupation of 淦工, who were craftsmen responsible for waterproofing boats by applying mud, and their descendants later took 淦 as their surname.
The surname 淦 is a rare name possibly tied to ancient river names or skilled boat-craftsmen who used waterproofing techniques.