Cognomen Lasith (Lasith 
) , around the world, is a rare last name. The cognomen Lasith is habitual in Southern Asia, particularly Sri Lanka, where it is quite a rare surname, and India, where it is an extremely rare surname. More frequently, Lasith is the forename as well as the last name.
Silva, Abayawardana, Rajapaksa, Weerakoon, Madushanka, Munasinghe, Sandaruwan, Samarakoon, Senanayake, Balasuriya, Karunasekera, Ranasinghe, Gunasekara, Jayasinghe, Wijesinghe, Chathuranga, Dissanayake, Gunathilake, Jayawardana, Jayawardane, Haputhanthiri, Weerasinghe, Udayanga, Karunarathna, Wijemanna, Harshana, Eshan, Mendis, Anjula, Kumara, Perera, Roshan, Gamage, Malinga, Sameera, Chamara, Bandara, Rangana, Dilshan, Thilina, Hansaka, Fonseka, Iroshan, Kayakkal, Lansakara, Liyanage, Niroshan, Fernando, and Hettiarachchi