Cognomen Wimalarathna (Wimalarathna 
) , all over the world, is quite a rare last name. The surname Wimalarathna is characteristic of Sri Lanka, where it is quite a common surname, Qatar, where it is a rare surname, and United Arab Emirates. Very seldom, Wimalarathna is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wimalarathna | Qatar, United Arab Emirates, Sri Lanka, Australia, United States |
| p. r. b. wimalarathna Sri Lankan politician and military leader of JVP (1958–1990), LK (b. 1946) |
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| helen wimalarathna researcher, ORCID id # 0000-0002-3520-7808 |
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Mr, Indika, Iresha, Sanjaya, Sharmen, Suranga, Anupama, Charith, Chamila, Chamith, Kawinda, Roshini, Dilshan, Lankitha, Janitha, Jeewani, Tharidu, Thilini, Hansini, Hasitha, I Sandya Rathnayaka, Wanigamuni, Vishwa, Nalini, Janaka, Lalith, Nisa, Susil, Aruna, Amila, Ayona, Kasun, Dulip, Gayan, Nauli, Nimal, Samantha, Isuru, Uvini, Menaka, Sachie, Ananda, Amanda, Kumara, Prasad, Danush, Damith, Gamini, Wimal, and Chaminda