Family name ยงแก้ว (Yongkaeo 
, ยงแก้ว, Yonkaew 
) , across the world, is an extremely rare cognomen. The family name ยงแก้ว is habitual in Thailand, where it is an extremely rare surname, and the United States. Much less frequently, ยงแก้ว is the forename as well as the last name.