Surname Oană (Oană 
) , all around the world, is a rare last name. The cognomen Oană is habitual in Romania, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Very seldom, Oană is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Oană | Romania, United Kingdom, United States |
| ilie oană Romanian footballer (1918-1993), US (b. 1918) |
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| gheorghe oană politician (b. 1949) |
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| vasile oană Romanian footballer, RO (b. 1972) |
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| dănuț oană Romanian politician from Doclin, Caraș-Severin County, RO |
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| marinela oană Romanian politician from Șibot, Alba County, RO |
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| ioana-elena oană researcher (ORCID 0000-0003-1507-8217) |
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Ana, Denisa, Darius, George, Lucian, Teodor, Eduard, Andreea, Robert, Claudiu, Flavius, Madalina, Nicoleta, Sebastian, Alexandra, Alexandru, Georgiana, Gabriel, Mădălina, Ramona, Cosmin, Nae, Radu, Oana, Maria, Mihai, Sabin, Sorin, Bianca, Alina, Tudor, Elena, Ionut, Iulia, Marius, Mirela, Andrei, Denis, and Constantin