Cognomen Thani (Thani 
, ثاني 
, Тани 
) , throughout the world, is a common last name. The cognomen Thani is characteristic of Qatar, where it is a common surname, Bahrain, where it is quite a common surname, and Suriname (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Qatar, Sudan, and Iran. Likewise, Thani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Thani | Qatar, Malaysia, India, Bahrain, United Arab Emirates |
| ثاني | Egypt, Sudan, Iraq, Saudi Arabia, Iran |
| Тани | Azerbaijan, Russia, Bulgaria, Kazakhstan, Lithuania |
| ธนิสร์ | Thailand |
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ahmed bin jassim al thani politician (b. 1901) |
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| ahmed bin muhammed al thani politician, QA (b. 1853) |
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| thani bin jassim bin mohammed al thani Sheikh of Al Gharafa (b. 1856) |
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| abdulrahman bin jassim al thani Qatari mayor (b. 1871) |
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| mohammed bin jassim al thani Member of Royal family and mayor of Umm Salal Muhammed and Doha city, QA (b. 1881) |
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| muhammad bin jabr al thani Qatar royalty and Minister of Municipal Affairs (b. 1916) |
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saud bin muhammed al thani Qatar prince (1966-2014) (b. 1966) |
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thani mohamed soilihi Mayotte politician, FR (b. 1972) |
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| muhammed bin ali al thani Qatari Shaikh (b. 1922) |
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| mohammed bin hamad bin abdullah al thani Member of Royal family and Government minister of Qatar (b. 1934) |
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thani bin hamad bin khalifa al-thani QA |
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mohammed al thani (b. 1983) |
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| ahmed bin saif al thani ambassador (b. 1946) |
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| saud bin abdelaziz bin hamad al thani Member of Royal family and politician (b. 1949) |
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| hamad bin khalid al thani Chief of Qatari police force, QA (b. 1952) |
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