Family name ประจงใจ (ประจงใจ 
) , all around the world, is a rare surname. The surname ประจงใจ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| ประจงใจ | Thailand |
| รวินดา ประจงใจ badminton player, TH (b. 1993) |
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