Last name Wickramarachchi (Wickramarachchi 
) , in the entire world, is quite a common surname. The cognomen Wickramarachchi is characteristic of Sri Lanka, where it is quite a common surname, Qatar, where it is a rare surname, and United Arab Emirates. In absolute terms, it is commonest in Sri Lanka, Saudi Arabia, and United Arab Emirates. Very seldom, Wickramarachchi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wickramarachchi | Australia, United Arab Emirates, United States, Saudi Arabia, Sri Lanka |
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g. p. wickramarachchi LK (b. 1889) |
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| anuradha wickramarachchi researcher |
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| chandula wickramarachchi researcher |
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| nalin wickramarachchi researcher ORCID ID = 0000-0001-8031-6432 |
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| rajitha wickramarachchi Sri Lankan cricketer, LK (b. 1987) |
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Mr, Kelum, Ranga, Ranil, Ruwan, Dilki, Dulan, Dulal, Gihan, Lanka, Kasun, Leena, Nalin, Nilan, Nipun, Nuwan, Hiran, Isuru, Udani, Mayuri, Mayumi, Tilan, Kamal, Kalum, Ayesh, Ms, Ama, Don, Lal, Mary, Ajit, Ceng, Rivi, Hasi, Upul, Mario, Milan, Siram, Supul, Anupa, Anuja, Anoja, Aruna, Amali, Aseka, Akila, Mahesh, and Mihira