Cognomen ใยถาวร (ใยถาวร ) , in all the world, is a very rare surname. The cognomen ใยถาวร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
กิตติ, ปัญจา, อุมาพร, ศรีไพร, บุญยิง, ประยูร, บุญสนอง, and ณัฏฐนิช
) , in all the world, is a very rare surname. The cognomen ใยถาวร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.