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Last name Gaid (قايد , Gaid , Гайд ) , worldwide, is a common surname. The last name Gaid is characteristic of Yemen, where it is quite a common surname, Saudi Arabia, and Algeria, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Yemen, Egypt, and Saudi Arabia. Likewise, Gaid is the forename as well as the last name.