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Last name Glac (غلاك , Glac ) , all over the world, is quite a common surname. The surname Glac is habitual in Western Asia, particularly Oman, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and Jordan. Measured by absolute frequency, this name is the most popular in Saudi Arabia, Egypt, and Iraq. Likewise, Glac is the forename as well as the last name.