Last name Ouatu (Ouatu 
) , throughout the world, is a rare cognomen. The family name Ouatu is characteristic of Romania, where it is quite a rare surname, Italy, where it is a very rare surname, and the United Kingdom. Much less frequently, Ouatu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ouatu | Romania, United Kingdom, Italy, United States, France |
| vasile ouatu Romanian politician and businessperson, owner of VC Unic Piatra Neamț (1988–2020), RO (b. 1949) |
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| anca ouatu researcher (ORCID 0000-0001-8923-8194) |
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| sorin ouatu Romanian politician from Ștefan cel Mare, Neamț County, RO |
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Mr, Roxana, Darius, Damian, Lenuta, Teodor, Emilia, Viorel, Marcela, Mihaela, Aleinad, Andreea, Adriana, Camelia, Catalin, Liliana, Cristian, Cristina, Loredana, Alexandra, Alexandru, Georgiana, Bogdan, Cosmin, Adrian, Andrei, Ms, Adi, Ion, Alex, Paul, Luca, Vlad, Ioan, Oana, Cezar, Alessandro, Delia, Irina, Ionel, Ionut, Ioana, Marian, Marcel, Simona, Sergiu, Stefan, Andrew, Elena, and Constantin