Family name تنهایی (تنهایی 
) , all over the world, is a rare cognomen. The surname تنهایی is habitual in Afghanistan, where it is quite a rare surname, Iran, where it is a very rare surname, and Turkey, where it is an extremely rare surname. Much less frequently, تنهایی is the forename as well as the last name.
| حسین ابوالحسن تنهایی Iranian writer, IR |
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| منصور تنهایی Iranian footballer, IR (b. 1986) |
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