Surname Rohan (Rohan 
, روهان 
, 罗汉 
, and others...) , in all the world, is a common last name. The cognomen Rohan is habitual in British Virgin Islands, where it is quite a common surname, Mauritius, and Sri Lanka (explore the name in all countries). In absolute terms, this name is the most popular in Bangladesh, Sri Lanka, and the United States. More frequently, Rohan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rohan | Bangladesh, Nepal, United States, India, Sri Lanka |
| روهان | Iran, Iraq, Egypt, Sudan, Syria |
| 罗汉 | China |
| Рохан | Russia, Uzbekistan, Ukraine |
| Роган | Kazakhstan, Russia, Ukraine, Belarus |
| ロハン | Japan |
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alain iii de rohan (1135-1195) (b. 1130) |
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| alain i de rohan French noble (b. 1084) |
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alain iv de rohan (b. 1166) |
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| alain ii de rohan (b. 1150) |
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| geoffroy de rohan Breton nobleman (b. 1190) |
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| olivier i de rohan (b. 1191) |
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| alain v de rohan (1205-1242) (b. 1205) |
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| alain vi de rohan (b. 1232) |
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| olivier ii de rohan (b. 1271) |
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marguerite de rohan (b. 1330) |
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| alain vii de rohan (1302-1387) (b. 1308) |
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| alain viii de rohan (1350-1429) (b. 1350) |
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| alain ix de rohan (1382-1462), FR (b. 1382) |
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marguerite de rohan countess of Angouleme, FR (b. 1450) |
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jean ii de rohan powerful lord of Brittany at the end of the 15th century (b. 1452) |
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Raj, Joshi, Verma, Yadav, Manjhi, Mishra, Sawant, Sharma, Shetty, Shinde, Chavan, Kamble, Kapoor, Pandit, Prasad, Rajput, Gandhi, Jadhav, Thakur, Agarwal, Chauhan, Kulkarni, Gupta, Deshmukh, Desai, Pawar, Ray, Rao, Roy, Das, Lal, More, Shah, Khan, Jain, Naik, Mahto, Mehta, Singh, Sinha, Smith, Arora, Brown, Kadam, Kumar, Patil, Patel, Reddy, and Chaudhary