Across the world, รองแก้ว (Coaster 
, รองแก้ว) is a rare masculine first name. The forename รองแก้ว is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is a rare male name, South Africa, where it is a very rare masculine name, and Nigeria, where it is an extremely rare boy's name. More prevalently, รองแก้ว is the last name as well as the forename.