Family name 桂蘭 (Guilan 
, 계란 
, 桂蘭 ) , throughout the world, is a rare cognomen. The surname 桂蘭 is habitual in Philippines, where it is a rare surname, Romania, and Malaysia. In absolute terms, the name is most common in Philippines, China, and Malaysia. Much more frequently, 桂蘭 is the forename as well as the last name.