Cognomen Diwan (Diwan 
, ديوان 
, 迪万 
) , in the world, is a common family name. The cognomen Diwan is characteristic of Western Asia, particularly Lebanon, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Kuwait. Measured by absolute frequency, it is the most numerous in India, Philippines, and Indonesia. Likewise, Diwan is the forename as well as the last name.
| amram ben diwan Moroccan rabbi (1743-1782), MA (b. 1743) |
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| ranchhodji diwan author and chief minister of Junagadh state, British India (b. 1768) |
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| diwan chaman lall Indian politician and diplomat, IN (b. 1892) |
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| diwan singh Singh, Diwan (1894–1983), doctor and Sikh community leader (b. 1894) |
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| diwan singh Punjabi poet (b. 1894) |
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| diwan chand sharma politician, IN (b. 1896) |
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diwan rahul nanda businessperson, IN (b. 1971) |
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| diwan c. ahir (b. 1928) |
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| pawan diwan Indian politician, IN (b. 1945) |
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| ashok diwan Indian field hockey player (b. 1954) |
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| vinod kumar diwan (b. 1947) |
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| ishac diwan Lebanese economist, LB (b. 1957) |
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| diwan chand chawla politician, PK (b. 1961) |
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| muneeb diwan Canadian cricketer, CA (b. 1972) |
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| mukesh diwan cricketer, IN (b. 1976) |
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