Family name รองแก้ว (Coaster 
, รองแก้ว) , across the world, is a rare last name. The last name รองแก้ว is habitual in Algeria, where it is a rare surname, Tanzania, and New Zealand. In absolute terms, it most frequently occurs in Tanzania, Indonesia, and Algeria. Much less frequently, รองแก้ว is the forename as well as the last name.