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Worldwide, Rathnayaka (Rathnayaka
) is a rare primarily boy's, but very seldom feminine first name. The first name Rathnayaka is habitual in Sri Lanka, where it is quite a rare masculine name, Kuwait, where it is quite a rare epicene name, and Qatar, where it is a rare boy's name. Measured by absolute frequency, it is the most numerous in Sri Lanka, Kuwait, and Saudi Arabia. Predominantly, Rathnayaka is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rathnayaka | Saudi Arabia, Kuwait, United Arab Emirates, Sri Lanka, Qatar |