Last name Birău (Bíró 
, Birău ) , in the world, is quite a rare surname. The cognomen Birău is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Romania, where it is quite a rare surname, and Slovakia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Hungary, Romania, and Serbia. Very seldom, Birău is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bíró | Romania, Austria, Hungary, Serbia, Slovakia |
| Birău | Romania |
| vichentie birău Romanian footballer, RO (b. 1929) |
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| dănuț birău Romanian politician from Târgu Cărbunești, Gorj County, RO |
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| nicolae birău Romanian politician from Variaș, Timiș County, RO |
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