Throughout the world, หทัยกาญ (หทัยกาญ 
) is a rare mostly girly, but seldom boy's first name. The forename หทัยกาญ is habitual in South-eastern Asia, particularly Thailand, where it is a rare mostly feminine, but seldom boy's name.
| VARIANT | COUNTRY |
|---|---|
| หทัยกาญ | Thailand |