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Last name ולד (Weld , Ould , Wald ) , all around the world, is a common surname. The surname ולד is habitual in Mauritania, where it is quite a common surname, Algeria, where it is quite a rare surname, and Germany. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Mauritania. Also, ולד is the forename as well as the last name.