Throughout the world, จรรทร (จรรทร 
) is a very rare gender-neutral forename. The given name จรรทร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare unisex name.
| VARIANT | COUNTRY |
|---|---|
| จรรทร | Thailand |
ประจวบ, ทรายทอง, and ศรีเจริญสุข