Cognomen Bianu (Bianu 
) , across the world, is a rare last name. The last name Bianu is habitual in Eastern Europe, particularly Romania, where it is quite a rare surname, Czechia, where it is a rare surname, and Bulgaria. Measured by absolute frequency, it most frequently occurs in Romania, Czechia, and France. Much less frequently, Bianu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bianu | Tanzania, Czechia, India, Romania, France |
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ioan bianu Romanian philologist and librarian, RO (b. 1856) |
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| vasile bianu (b. 1858) |
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| ioan bianu Romanian lawyer, RO (b. 1882) |
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zéno bianu French poet, FR (b. 1950) |
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