Last name จิรกุลสวัสดิ์ (จิรกุลสวัสดิ์ 
, Jiarakulsawat, Jirakoonsawad) , in the world, is an extremely rare surname. The family name จิรกุลสวัสดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.