Family name เดือนแก้ว (Duankaew 
, เดือนแก้ว, Duankaeo ) , around the world, is a very rare last name. The family name เดือนแก้ว is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, เดือนแก้ว is the forename as well as the last name.