Globally, Dayantha (Dayantha 
) is a rare male forename. The first name Dayantha is habitual in Southern Asia, particularly Sri Lanka, where it is a rare masculine name. Much less frequently, Dayantha is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Dayantha | Italy, India, Australia, United States, Sri Lanka |
| dayantha wijeyesekera Sri Lankan engineer, LK (b. 1942) |
|
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| dayantha porambe British politician |
|
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| dayantha liyanage British politician |
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Silva, Ranasinghe, Kodituwakku, Abeysekera, Andrahennedy, Weerasena, Withanage, Obeyesekere, Vithanage, Wijekoon, Fernando, Liyanage, Lakpriya, Herath, Joshua, Peiris, Perera, Priya, Ilangasinghe, and Kurukulasuriya