Hagop Vahram Çerçiyan
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Hagop Vahram Çerçiyan (Armenian: Հակոբ Վահրամ Չերչիյան) was a 20th-century Armenian professor of mathematics, geography, and calligraphy at the Robert College of Istanbul, known for designing the signature of Mustafa Kemal Atatürk, the first president of Turkey.