Cognomen Bayar (Bayar 
, بيار 
, Баяр 
) , all over the world, is a common family name. The family name Bayar is habitual in Mongolia, where it is quite a common surname, Turkey, and Tunisia, where it is quite a rare surname. Very seldom, Bayar is the forename as well as the last name.
| denis-georges bayar Belgian architect and sculptor, BE (b. 1690) |
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| johann deodatus friedrich von bayar BE (b. 1700) |
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mahmut celâl bayar 3rd president of Turkey, TR (b. 1883) |
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nilüfer bayar gürsoy Turkish politician, TR (b. 1921) |
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| reşide bayar wife of Turkish president Celal Bayar, TR (b. 1886) |
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| muharrem celal bayar politician, TR (b. 1889) |
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| andre vahram bayar politician, TR (b. 1890) |
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michèle bayar French children's writer, FR (b. 1948) |
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| abdurrahman bayar Turkish politician, TR (b. 1916) |
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| nuri kemal bayar Turkish politician, TR (b. 1927) |
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| hikmet bayar Turkish general (1932–2019), TR (b. 1932) |
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| cahit bayar Turkish diplomat, TR (b. 1935) |
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| palamdorjiin bayar Mongolian boxer (b. 1941) |
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| zühtü bayar Turkish author (1943-2011), TR (b. 1943) |
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| mehmet ali bayar Turkish politician, TR (b. 1960) |
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