Family name Dilum (Dilum 
) , in all the world, is a rare cognomen. The family name Dilum is characteristic of Sri Lanka, where it is quite a rare surname, and China, where it is an extremely rare surname. More frequently, Dilum is the forename as well as the last name.
Don, Rushanka, Danushka, Liyanage, Fernando, Madusanka, Pathirana, Ranatunga, Ratnayake, Samarajeewa, Rajapaksha, Rathnayake, Rathnayaka, Dassanayake, Jayasinghe, Jayatilaka, Chandrasoma, Dissanayake, Jayawickrama, Munaweera Thantreege, Samarasinghe, Samaranayake, Prasanna, Hettiarachchi, Kodikara, Hettigoda, Silva, Meegoda, Kumara, Perera, Peiris, Prasad, Gamage, Gencel, Livera, Nilhan, Aluthge, Chamara, Chamika, Caldera, Bandara, Prabath, Rangana, Desilva, Lakshan, Tharaka, Nuradha, Fonseka, and Wickramasinghe