Worldwide, Dilanka (Dilanka 
) is quite a rare principally masculine, but very seldom feminine first name. The forename Dilanka is characteristic of Sri Lanka, where it is quite a common predominantly boy's, but very infrequently girly name, Qatar, where it is a rare boy's name, and Kuwait. Much less frequently, Dilanka is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Dilanka | Australia, Kuwait, United Arab Emirates, Sri Lanka, Qatar |
| dilanka dedduwakumara researcher (mathematics & statistics) |
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| dilanka l de silva researcher |
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| dilanka auwardt Sri Lankan cricketer, LK (b. 1990) |
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| dilanka isuru kumara Sri Lankan weightlifter (b. 1996) |
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