Family name วงศ์ไชยกิจ (วงศ์ไชยกิจ 
) , in all the world, is an extremely rare cognomen. The family name วงศ์ไชยกิจ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| วงศ์ไชยกิจ | Thailand |