Cognomen วงศ์ลัดดา (วงศ์ลัดดา 
) , in the world, is an extremely rare family name. The family name วงศ์ลัดดา is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, วงศ์ลัดดา is the forename as well as the last name.